ignore: make sure we have an xdg path before using it

Commit e3ebc35 (config: fix several access(NULL) calls, 2012-07-12) was
fixing access(NULL) calls when trying to access $HOME/.config/git/config,
but missed the ones when trying to access $HOME/.config/git/ignore. Fix
and test this.

Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/dir.c b/dir.c
index 390367fa6..059ec28db 100644
--- a/dir.c
+++ b/dir.c
@@ -1302,7 +1302,7 @@ void setup_standard_excludes(struct dir_struct *dir)
 	}
 	if (!access(path, R_OK))
 		add_excludes_from_file(dir, path);
-	if (!access(excludes_file, R_OK))
+	if (excludes_file && !access(excludes_file, R_OK))
 		add_excludes_from_file(dir, excludes_file);
 }