windows: make openhardlinks work

Despite the intention, openhardlinks would always evaluate to False.

mercurial/windows.py

@@ -68,7 +68,7 b' def _is_win_9x():'
         return 'command' in os.environ.get('comspec', '')
 
 def openhardlinks():
-    return not _is_win_9x and "win32api" in locals()
+    return not _is_win_9x() and "win32api" in globals()
 
 def system_rcpath():
     try: