Prevent throwing duplacite events for GameObject

Store last gameObject as static variable in tile mixin and in case new
event is exactly same as last one in game object spawned, do not
proceed.

Signed-off-by: Tomas Slusny <slusnucky@gmail.com>

runelite-mixins/src/main/java/net/runelite/mixins/RSTileMixin.java

@@ -58,6 +58,9 @@ public abstract class RSTileMixin implements RSTile
 	@Shadow("clientInstance")
 	private static RSClient client;
 
+	@Inject
+	private static GameObject lastGameObject;
+
 	@Inject
 	private WallObject previousWallObject;
 
@@ -208,12 +211,25 @@ public abstract class RSTileMixin implements RSTile
 
 		// Previous game object
 		GameObject previous = previousGameObjects[idx];
+
 		// GameObject that was changed.
 		RSGameObject current = (RSGameObject) getGameObjects()[idx];
 
+		// Last game object
+		GameObject last = lastGameObject;
+
+		// Update last game object
+		lastGameObject = current;
+
 		// Update previous object to current
 		previousGameObjects[idx] = current;
 
+		// Duplicate event, return
+		if (current != null && current.equals(last))
+		{
+			return;
+		}
+
 		// Characters seem to generate a constant stream of new GameObjects
 		if (current == null || !(current.getRenderable() instanceof Actor))
 		{