fix NPE

api/src/main/java/net/jitse/npclib/internal/NPCBase.java

@@ -45,7 +45,8 @@ public abstract class NPCBase implements NPC, NPCPacketHandler {
     protected List<String> text;
     protected Location location;
     protected Skin skin;
-    protected Hologram hologram;
+
+    //protected Hologram hologram;
 
     protected final Map<NPCSlot, ItemStack> items = new EnumMap<>(NPCSlot.class);
 
@@ -90,7 +91,6 @@ public abstract class NPCBase implements NPC, NPCPacketHandler {
             Hologram hologram = getPlayerHologram(targetPlayer); //
             List<Object> updatePackets = hologram.getUpdatePackets(getPlayerLines(targetPlayer));
             hologram.update(targetPlayer, updatePackets);
-            hologram.show(targetPlayer);
         }
         return this;
     }
@@ -348,8 +348,8 @@ public abstract class NPCBase implements NPC, NPCPacketHandler {
         for (UUID shownUuid : shown) {
             Player player = Bukkit.getPlayer(shownUuid);
             if (player != null && isShown(player)) {
-                Hologram originalhologram = getPlayerHologram(player);
+                Hologram originalHologram = getPlayerHologram(player);
-                originalhologram.hide(player); // essentially destroy the hologram
+                originalHologram.hide(player); // essentially destroy the hologram
                 textDisplayHolograms.remove(player.getUniqueId()); // remove the old obj
                 Hologram hologram = getPlayerHologram(player); // let it regenerate
                 List<Object> updatePackets = hologram.getUpdatePackets(getPlayerLines(player));

nms/v1_10_R1/src/main/java/net/jitse/npclib/nms/v1_10_R1/NPC_v1_10_R1.java

@@ -103,7 +103,7 @@ public class NPC_v1_10_R1 extends NPCBase {
         playerConnection.sendPacket(packetPlayOutEntityDestroy);
         playerConnection.sendPacket(packetPlayOutPlayerInfoRemove);
 
-        hologram.hide(player);
+        getPlayerHologram(player).hide(player);
     }
 
     @Override

nms/v1_11_R1/src/main/java/net/jitse/npclib/nms/v1_11_R1/NPC_v1_11_R1.java

@@ -103,7 +103,7 @@ public class NPC_v1_11_R1 extends NPCBase {
         playerConnection.sendPacket(packetPlayOutEntityDestroy);
         playerConnection.sendPacket(packetPlayOutPlayerInfoRemove);
 
-        hologram.hide(player);
+        getPlayerHologram(player).hide(player);
     }
 
     @Override

nms/v1_12_R1/src/main/java/net/jitse/npclib/nms/v1_12_R1/NPC_v1_12_R1.java

@@ -103,7 +103,7 @@ public class NPC_v1_12_R1 extends NPCBase {
         playerConnection.sendPacket(packetPlayOutEntityDestroy);
         playerConnection.sendPacket(packetPlayOutPlayerInfoRemove);
 
-        hologram.hide(player);
+        getPlayerHologram(player).hide(player);
     }
 
     @Override

nms/v1_13_R1/src/main/java/net/jitse/npclib/nms/v1_13_R1/NPC_v1_13_R1.java

@@ -103,7 +103,7 @@ public class NPC_v1_13_R1 extends NPCBase {
         playerConnection.sendPacket(packetPlayOutEntityDestroy);
         playerConnection.sendPacket(packetPlayOutPlayerInfoRemove);
 
-        hologram.hide(player);
+        getPlayerHologram(player).hide(player);
     }
 
     @Override

nms/v1_13_R2/src/main/java/net/jitse/npclib/nms/v1_13_R2/NPC_v1_13_R2.java

@@ -102,7 +102,7 @@ public class NPC_v1_13_R2 extends NPCBase {
         playerConnection.sendPacket(packetPlayOutEntityDestroy);
         playerConnection.sendPacket(packetPlayOutPlayerInfoRemove);
 
-        hologram.hide(player);
+        getPlayerHologram(player).hide(player);
     }
 
     @Override

nms/v1_14_R1/src/main/java/net/jitse/npclib/nms/v1_14_R1/NPC_v1_14_R1.java

@@ -98,7 +98,7 @@ public class NPC_v1_14_R1 extends NPCBase {
         playerConnection.sendPacket(packetPlayOutEntityDestroy);
         playerConnection.sendPacket(packetPlayOutPlayerInfoRemove);
 
-        hologram.hide(player);
+        getPlayerHologram(player).hide(player);
     }
 
     @Override

nms/v1_15_R1/src/main/java/net/jitse/npclib/nms/v1_15_R1/NPC_v1_15_R1.java

@@ -99,7 +99,7 @@ public class NPC_v1_15_R1 extends NPCBase {
         playerConnection.sendPacket(packetPlayOutEntityDestroy);
         playerConnection.sendPacket(packetPlayOutPlayerInfoRemove);
 
-        hologram.hide(player);
+        getPlayerHologram(player).hide(player);
     }
 
     @Override

nms/v1_16_R1/src/main/java/net/jitse/npclib/nms/v1_16_R1/NPC_v1_16_R1.java

@@ -102,7 +102,7 @@ public class NPC_v1_16_R1 extends NPCBase {
         playerConnection.sendPacket(packetPlayOutEntityDestroy);
         playerConnection.sendPacket(packetPlayOutPlayerInfoRemove);
 
-        hologram.hide(player);
+        getPlayerHologram(player).hide(player);
     }
 
     @Override

nms/v1_8_R2/src/main/java/net/jitse/npclib/nms/v1_8_R2/NPC_v1_8_R2.java

@@ -103,7 +103,7 @@ public class NPC_v1_8_R2 extends NPCBase {
 
         playerConnection.sendPacket(packetPlayOutEntityDestroy);
         playerConnection.sendPacket(packetPlayOutPlayerInfoRemove);
-        hologram.hide(player);
+        getPlayerHologram(player).hide(player);
     }
 
     @Override

nms/v1_8_R3/src/main/java/net/jitse/npclib/nms/v1_8_R3/NPC_v1_8_R3.java

@@ -102,7 +102,7 @@ public class NPC_v1_8_R3 extends NPCBase {
         playerConnection.sendPacket(packetPlayOutEntityDestroy);
         playerConnection.sendPacket(packetPlayOutPlayerInfoRemove);
 
-        hologram.hide(player);
+        getPlayerHologram(player).hide(player);
     }
 
     @Override

nms/v1_9_R1/src/main/java/net/jitse/npclib/nms/v1_9_R1/NPC_v1_9_R1.java

@@ -103,7 +103,7 @@ public class NPC_v1_9_R1 extends NPCBase {
         playerConnection.sendPacket(packetPlayOutEntityDestroy);
         playerConnection.sendPacket(packetPlayOutPlayerInfoRemove);
 
-        hologram.hide(player);
+        getPlayerHologram(player).hide(player);
     }
 
     @Override

nms/v1_9_R2/src/main/java/net/jitse/npclib/nms/v1_9_R2/NPC_v1_9_R2.java

@@ -104,7 +104,7 @@ public class NPC_v1_9_R2 extends NPCBase {
         playerConnection.sendPacket(packetPlayOutEntityDestroy);
         playerConnection.sendPacket(packetPlayOutPlayerInfoRemove);
 
-        hologram.hide(player);
+        getPlayerHologram(player).hide(player);
     }
 
     @Override