avcodec: disable multithreaded decoding when 'ffmpeg-hw' is used.

modules/codec/avcodec/video.c

@@ -369,7 +369,7 @@ int InitVideoDec( decoder_t *p_dec, AVCodecContext *p_context,
          i_codec_id == CODEC_ID_H264 ||
          i_codec_id == CODEC_ID_VC1 || i_codec_id == CODEC_ID_WMV3) )
     {
-#if defined(HAVE_AVCODEC_MT) && LIBAVCODEC_VERSION_INT < AV_VERSION_INT(55, 1, 0)
+#if defined(HAVE_AVCODEC_MT)/*  && LIBAVCODEC_VERSION_INT < AV_VERSION_INT(55, 1, 0) */
         if( p_sys->p_context->thread_type & FF_THREAD_FRAME )
         {
             msg_Warn( p_dec, "threaded frame decoding is not compatible with ffmpeg-hw, disabled" );