cisco/openh264 — pull request #1323 by huili2 (2014-09-03 05:20:52+00:00)
Title: when sps/pps non exist, return dsNoParamSets

when merging #1161 (into master) from #1146 (into openh264v1.1), these codes are missing due to conflicts and manual merging.
Add them back now.

After this, slice parse error will set dsBitstreamError except for these related to SPS/PPS, which set dsNoParamSets.