[PATCH] dir.c: print correct errno when opendir() fails

["Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>]

The call invalidate_directory() between opendir() and warning_errno() in
theory could make some system calls and change errno. Prevent that by
warning immediately after opendir().

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 This is on top of nd/fix-untracked-cache-invalidation which is now on
 'next'. Sorry I waited too long to send the replacement and it's now
 too late.

 dir.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/dir.c b/dir.c
index dd1e50c328..55736d3e2a 100644
--- a/dir.c
+++ b/dir.c
@@ -1795,14 +1795,14 @@ static int open_cached_dir(struct cached_dir *cdir,
 		return 0;
 	c_path = path->len ? path->buf : ".";
 	cdir->fdir = opendir(c_path);
+	if (!cdir->fdir)
+		warning_errno(_("could not open directory '%s'"), c_path);
 	if (dir->untracked) {
 		invalidate_directory(dir->untracked, untracked);
 		dir->untracked->dir_opened++;
 	}
-	if (!cdir->fdir) {
-		warning_errno(_("could not open directory '%s'"), c_path);
+	if (!cdir->fdir)
 		return -1;
-	}
 	return 0;
 }
 
-- 
2.15.1.600.g899a5f85c6