wininet: Initialize user_len before GetUserNameW call.

[Sebastian Lackner]

Fixes a regression introduced by 441347f084963ef9f9ae721e5731284443c40656.

Signed-off-by: Sebastian Lackner <sebastian at fds-team.de>
---
 dlls/wininet/cookie.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/dlls/wininet/cookie.c b/dlls/wininet/cookie.c
index 8e9ebfb..34c6c0b 100644
--- a/dlls/wininet/cookie.c
+++ b/dlls/wininet/cookie.c
@@ -151,6 +151,7 @@ static WCHAR *create_cookie_url(substr_t domain, substr_t path, substr_t *ret_pa
 
     static const WCHAR cookie_prefix[] = {'C','o','o','k','i','e',':'};
 
+    user_len = sizeof(user)/sizeof(WCHAR);
     if(!GetUserNameW(user, &user_len))
         return FALSE;
     user_len--;
-- 
2.8.0