Fixed getting and setting of blocks in unloaded chunks

src/main/java/com/sk89q/worldedit/LocalWorld.java

@@ -349,6 +349,13 @@ public abstract class LocalWorld {
         return type >= 0 && type < 96;
     }
 
+    /**
+     * Checks if the chunk pt is in is loaded. if not, loads the chunk
+     *
+     * @param pt Position to check
+     */
+    public abstract void checkLoadedChuck(Vector pt);
+
     /**
      * Compare if the other world is equal.
      *