Invoke the native acknowledge notify routine only when queue is non-empty. Checkin for kipp@netscape.com.
Invoke the native acknowledge notify routine only when queue is non-empty.
Checkin for kipp@netscape.com.

makotokato/nsprpub,makotokato/nsprpub,makotokato/nsprpub,makotokato/nsprpub,makotokato/nsprpub