[PATCH 2/3] Avoid undefined result in ntdll_wcstoumbs() in case of error.

[Paul Gofman]

Undefined result is due to RtlUnicodeToUTF8N() not setting output
length on error which is a correct behaviour according to
existing tests.

'Planet Zoo' is affected which passes NULL object name buffer to
NtCreateFile().

Signed-off-by: Paul Gofman 
---
 dlls/ntdll/locale.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dlls/ntdll/locale.c b/dlls/ntdll/locale.c
index a28f5d0f58..da29241517 100644
--- a/dlls/ntdll/locale.c
+++ b/dlls/ntdll/locale.c
@@ -1020,7 +1020,7 @@ DWORD ntdll_umbstowcs( const char *src, DWORD srclen, WCHAR *dst, DWORD dstlen )
  */
 int ntdll_wcstoumbs( const WCHAR *src, DWORD srclen, char *dst, DWORD dstlen, BOOL strict )
 {
-    DWORD i, reslen;
+    DWORD i, reslen = 0;

if (!unix_table.CodePage)
         RtlUnicodeToUTF8N( dst, dstlen, &reslen, src, srclen * sizeof(WCHAR) );