fs/ntfs3: Fix memory leak in indx_find_sort()

When popping a level from the index lookup stack, indx_find_sort() frees
the struct indx_node but not the index buffer it owns. Every call that
descends and then pops a level leaks that allocation.

Free n->index before freeing the node itself.

Signed-off-by: Konstantin Komarov <[email protected]>

fs/ntfs3/index.c

@@ -1325,6 +1325,7 @@ pop_level:
 		/* Pop one level. */
 		if (n) {
 			fnd_pop(fnd);
+			kfree(n->index);
 			kfree(n);
 		}