scrrun: Add a check for empty string in start_enumeration.

[Gerald Pfeifer]

Someone could call start_enumeration with an empty string; this
small additional check avoids problems in that case.

Gerald
---
 dlls/scrrun/filesystem.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dlls/scrrun/filesystem.c b/dlls/scrrun/filesystem.c
index 434b402..f6f7703 100644
--- a/dlls/scrrun/filesystem.c
+++ b/dlls/scrrun/filesystem.c
@@ -1130,7 +1130,7 @@ static HANDLE start_enumeration(const WCHAR *path, WIN32_FIND_DATAW *data, BOOL
 
     strcpyW(pathW, path);
     len = strlenW(pathW);
-    if (pathW[len-1] != '\\')
+    if (len && pathW[len-1] != '\\')
         strcatW(pathW, bsW);
     strcatW(pathW, allW);
     handle = FindFirstFileW(pathW, data);
-- 
2.0.0