[gnome-builder] git: use g_file_monitor_file() and don't leak index_file

[Christian Hergert <chergert src gnome org>]

commit 126eedf43c4428883e8e5e32c7359682ecae3f75
Author: Christian Hergert <christian hergert me>
Date:   Sat Apr 25 17:04:48 2015 -0700

    git: use g_file_monitor_file() and don't leak index_file
    
    Debug code that slipped into previous commit.

 libide/git/ide-git-vcs.c |    4 +---
 1 files changed, 1 insertions(+), 3 deletions(-)
---
diff --git a/libide/git/ide-git-vcs.c b/libide/git/ide-git-vcs.c
index cb3c704..511d744 100644
--- a/libide/git/ide-git-vcs.c
+++ b/libide/git/ide-git-vcs.c
@@ -436,9 +436,7 @@ ide_git_vcs_load_monitor (IdeGitVcs  *self,
 
       location = ggit_repository_get_location (self->repository);
       index_file = g_file_get_child (location, "index");
-      monitor = g_file_monitor (index_file, flags, NULL, error);
-
-      g_object_ref (index_file);
+      monitor = g_file_monitor_file (index_file, flags, NULL, error);
 
       ret = !!monitor;