libmix: finish decoding the last frame even we encounter error when deocde the new frame

BZ: 154409

finish decoding the last frame even we encounter error when deocde the new frame

Change-Id: Iaa0c507c3c1ad209c3b8fe2783b104f76b5c1920
Signed-off-by: Gu, Wangyi <wangyi.gu@intel.com>
1 file changed