if (!gHashTable)
if (!gHashTable || !mFileSpec)
NS_IMETHODIMP nsPref::SavePrefFile()//----------------------------------------------------------------------------------------{    if (!gHashTable)        return PREF_NOT_INITIALIZED;#ifdef PREF_SUPPORT_OLD_PATH_STRINGS    if (gFileName)        return _convertRes(PREF_SavePrefFile());#endif    return _convertRes(PREF_SavePrefFileSpecWith(mFileSpec, (PLHashEnumerator)pref_savePref));}