return !wasRead ? NS_OK : NS_COMFALSE;
return !wasRead ? NS_OK : NS_ERROR_FAILURE;
nsMsgUnreadFilter(nsIMsgDBHdr* msg, void* closure){    nsMsgDatabase* db = (nsMsgDatabase*)closure;    PRBool wasRead = PR_TRUE;    nsresult rv = db->IsHeaderRead(msg, &wasRead);    if (NS_FAILED(rv)) 		return rv;    return !wasRead ? NS_OK : NS_COMFALSE;}