Fix null, fixed FlagWatchers, fixed typo on EquipmentSlot

src/me/libraryaddict/disguise/utilities/DisguiseUtilities.java

@@ -606,6 +606,9 @@ public class DisguiseUtilities
         if (mainThread != Thread.currentThread())
             throw new IllegalStateException("Cannot modify disguises on an async thread");
 
+        if (disguise.getEntity() == null)
+            throw new IllegalStateException("The entity for the disguisetype " + disguise.getType().name() + " is null!");
+
         List<Player> players = new ArrayList<>();
 
         try

src/me/libraryaddict/disguise/utilities/ReflectionManager.java

@@ -831,7 +831,7 @@ public class ReflectionManager
             case "CHEST":
                 return EquipmentSlot.CHEST;
             case "HEAD":
-                return EquipmentSlot.HAND;
+                return EquipmentSlot.HEAD;
             }
         }
         catch (Exception e)