winhttp: Fix return value for relative redirects.

Signed-off-by: Hans Leidekker <hans@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
(cherry picked from commit ec46607ee0)
Signed-off-by: Michael Stefaniuc <mstefani@winehq.org>

dlls/winhttp/request.c

@@ -2570,6 +2570,7 @@ static DWORD handle_redirect( struct request *request, DWORD status )
         }
         heap_free( request->path );
         request->path = path;
+        ret = ERROR_SUCCESS;
 
         send_callback( &request->hdr, WINHTTP_CALLBACK_STATUS_REDIRECT, location, len_loc + 1 );
     }