Fix memory leak

src/datawizard/filters.c

@@ -338,7 +338,8 @@ void starpu_data_unpartition(starpu_data_handle_t root_handle, uint32_t gatherin
 	}
 
 	/* there is no child anymore */
-	//free(root_handle->children);
+	free(root_handle->children);
+	root_handle->children = NULL;
 	root_handle->nchildren = 0;
 
 	/* now the parent may be used again so we release the lock */