add missing exception in _sys_getwindowsversion_from_kernel32

Author: maxbachmann

Python/sysmodule.c

@@ -1643,6 +1643,7 @@ static PyObject *
 _sys_getwindowsversion_from_kernel32(void)
 {
 #ifndef MS_WINDOWS_DESKTOP
+    PyErr_SetFromWindowsErr(0);
     return NULL;
 #else
     HANDLE hKernel32;