Avcodec: deactivate DR on cinepack

Close #5872
(cherry picked from commit c7b49343)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/codec/avcodec/video.c

@@ -302,6 +302,7 @@ int InitVideoDec( decoder_t *p_dec, AVCodecContext *p_context,
        (p_sys->p_codec->capabilities & CODEC_CAP_DR1) &&
         /* No idea why ... but this fixes flickering on some TSCC streams */
         p_sys->i_codec_id != CODEC_ID_TSCC && p_sys->i_codec_id != CODEC_ID_CSCD &&
+        p_sys->i_codec_id != CODEC_ID_CINEPAK &&
 #if (LIBAVCODEC_VERSION_INT >= AV_VERSION_INT( 52, 68, 2 ) ) && (LIBAVCODEC_VERSION_INT < AV_VERSION_INT( 52, 100, 1 ) )
         /* avcodec native vp8 decode doesn't handle EMU_EDGE flag, and I
            don't have idea howto implement fallback to libvpx decoder */