ui-tree: fix resource leak: free before return

Coverity-id: 13938
Signed-off-by: Christian Hesse <mail@eworm.de>
diff --git a/ui-tree.c b/ui-tree.c
index 1b310d5..d71503d 100644
--- a/ui-tree.c
+++ b/ui-tree.c
@@ -143,6 +143,7 @@
 			htmlf("<tr><td colspan='3'>Bad object: %s %s</td></tr>",
 			      name,
 			      sha1_to_hex(sha1));
+			free(name);
 			return 0;
 		}
 	}