From 5f9913570acc6814e11f6f04fdb7d79953530d5e Mon Sep 17 00:00:00 2001
From: Klaas Freitag <freitag@owncloud.com>
Date: Thu, 4 Jul 2013 14:09:05 +0200
Subject: [PATCH] std: Handle NULL pointer argument in c_dir() correctly.

---
 src/std/c_dir.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/std/c_dir.c b/src/std/c_dir.c
index 0dfc5d3db..0a9c96343 100644
--- a/src/std/c_dir.c
+++ b/src/std/c_dir.c
@@ -178,8 +178,10 @@ int c_isdir(const char *path) {
   mbchar_t *wpath = c_utf8_to_locale(path);
   int re = 0;
 
-  if (_tstat (wpath, &sb) == 0 && S_ISDIR(sb.st_mode)) {
-   re = 1;
+  if (path != NULL) {
+      if (_tstat (wpath, &sb) == 0 && S_ISDIR(sb.st_mode)) {
+          re = 1;
+      }
   }
   c_free_locale_string(wpath);
   return re;