small fix

src/tree/delete.c

@@ -28,6 +28,7 @@ TR_treeDelete(TR_Tree * this, const void * search, TR_TreeComp comp)
 {
 	TR_Tree node = *this;
 	TR_Tree del_node;
+	TR_Tree sibling;
 	int     found;
 
 	void    * data;
@@ -104,10 +105,7 @@ TR_treeDelete(TR_Tree * this, const void * search, TR_TreeComp comp)
 	 * rebalancing process...(this does not make much sense, but
 	 * to be honest I don't know now.)
 	 */
-	{
-		TR_Tree sibling = TR_TREE_SIBLING(node);
 	TR_TREE_BALANCE_DELETE(this, node, sibling);
-	}
 
 	TR_delete(del_node);
 	return data;