net: FormatMessage() now reports ERROR_NO_WORK_DONE error for empty string.

programs/net/net.c

@@ -59,9 +59,8 @@ static int output_vprintf(const WCHAR* fmt, __ms_va_list va_args)
     WCHAR str[8192];
     int len;
 
-    SetLastError(NO_ERROR);
     len = FormatMessageW(FORMAT_MESSAGE_FROM_STRING, fmt, 0, 0, str, ARRAY_SIZE(str), &va_args);
-    if (len == 0 && GetLastError() != NO_ERROR)
+    if (len == 0 && GetLastError() != ERROR_NO_WORK_DONE)
         WINE_FIXME("Could not format string: le=%u, fmt=%s\n", GetLastError(), wine_dbgstr_w(fmt));
     else
         output_write(str, len);