Fix flickering when decoding TSCC. (Backport if we're doing a 0.9.10)

modules/codec/avcodec/video.c

@@ -292,6 +292,8 @@ int InitVideoDec( decoder_t *p_dec, AVCodecContext *p_context,
         p_sys->p_context->pix_fmt != PIX_FMT_YUV422P &&
         /* H264 uses too many reference frames */
         p_sys->i_codec_id != CODEC_ID_H264 &&
+        /* No idea why ... but this fixes flickering on some TSCC streams */
+        p_sys->i_codec_id != CODEC_ID_TSCC &&
         !p_sys->p_context->debug_mv )
     {
         /* Some codecs set pix_fmt only after the 1st frame has been decoded,