PR_snprintf(fontpackageid, sizeof(fontpackageid), lang3);
PR_snprintf(fontpackageid, sizeof(fontpackageid), "lang:%s", lang3);
CheckFontLangGroup(     nsIAtom* lang1, nsIAtom* lang2, const char* lang3, PRBool& hit,     PRBool& check, PRBool& have){  if (!have && !hit && (lang1 == lang2)) {     hit = PR_TRUE; // so next time we don't bother to ask     if (!check) {       nsFontEnumeratorWin enumerator;       if (NS_SUCCEEDED(enumerator.HaveFontFor(lang3, &have)))         check = PR_TRUE; // so next time we don't bother to check.     }     if (!have) {       nsresult res = NS_OK;       nsCOMPtr<nsIFontPackageProxy> proxy = do_GetService("@mozilla.org/intl/fontpackageservice;1", &res);       NS_ASSERTION(NS_SUCCEEDED(res), "cannot get the font package proxy");       NS_ASSERTION(proxy, "cannot get the font package proxy");       if (proxy) {         char fontpackageid[256];         PR_snprintf(fontpackageid, sizeof(fontpackageid), lang3);         res = proxy->NeedFontPackage(fontpackageid);         NS_ASSERTION(NS_SUCCEEDED(res), "cannot notify missing font package ");       }     }  }}