libmix: fix corruption issue for MPEG-4:2 clips

BZ: 23492

Fix the corruption issue for MPEG-4:2 for by handling skip
frame correctly
Signed-off-by: Weian Chen <weian.chen@intel.com>

Change-Id: I64a8caebbca9ad8b38b9eb4d29de5b42083597b3
Reviewed-on: http://android.intel.com:8080/35821
Reviewed-by: Qiu, Junhai <junhai.qiu@intel.com>
Reviewed-by: Ding, Haitao <haitao.ding@intel.com>
Tested-by: Ding, Haitao <haitao.ding@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>
1 file changed