ref: 0a1b61508b45adfcaa5f204ac27b613a2fbe256f
parent: 3f333b01fdc194d03d5c3902c3a819d53041e7ae
author: ruil2 <ruil2@cisco.com>
date: Wed Jun 25 09:31:48 EDT 2014
fix defect7654 that the encoder won't generate IDR when temporal layer setting changes