Fix sign editing

BauSystem_Core/src/de/steamwar/bausystem/world/RegionListener.java

@@ -56,8 +56,8 @@ public class RegionListener implements Listener {
     private static final Reflection.FieldAccessor<Integer> blockPosY = Reflection.getField(baseBlockPosition, int.class, 1);
     private static final Reflection.FieldAccessor<Integer> blockPosZ = Reflection.getField(baseBlockPosition, int.class, 2);
     public RegionListener() {
-        TinyProtocol.instance.setInFilter((player, channel, packet) -> {
-            if(!signEditing.contains(player) || !updateSign.isInstance(packet))
+        TinyProtocol.instance.addFilter(updateSign, (player, packet) -> {
+            if(!signEditing.contains(player))
                 return packet;
 
             String[] lines = signText.get(packet);