Hollow fix

worldedit-core/src/main/java/com/sk89q/worldedit/EditSession.java

@@ -3376,12 +3376,10 @@ public class EditSession extends AbstractDelegateExtent implements HasFaweQueue,
 
     private void recurseHollow(Region region, BlockVector3 origin, Set<BlockVector3> outside) {
         final LocalBlockVectorSet queue = new LocalBlockVectorSet();
-
+        queue.add(origin);
         while (!queue.isEmpty()) {
-            Iterator<BlockVector3> iter = queue.iterator();
-            while (iter.hasNext()) {
-                BlockVector3 current = iter.next();
-                iter.remove();
+        	BlockVector3 current = queue.getIndex(0);
+        	queue.remove(current);
         	final BlockState block = getBlock(current);
         	if (block.getBlockType().getMaterial().isMovementBlocker()) {
         		continue;
@@ -3400,7 +3398,6 @@ public class EditSession extends AbstractDelegateExtent implements HasFaweQueue,
         	}
         }        
     }
-    }
 
     public int makeBiomeShape(final Region region, final Vector3 zero, final Vector3 unit, final BiomeType biomeType,
                               final String expressionString, final boolean hollow)