multimedia/vdr-plugin-markad: Fix build with ffmpeg 3.0.x
- Update patch of command/decoder.cpp to allow vdr-plugin-markad to build successfully once multimedia/ffmpeg is updated to 3.0.x. Note that multimedia/ffmpeg is currently still on the 2.8.x branch, however this patch is backwards compatible with ffmpeg 2.8.x. The additional changes to this file were based on upstream bug report #1898 , and also the requirement to replace s/avcodec_alloc_frame/av_frame_alloc/g.
- Regenerate patches with makepatch (pet portlint), and remove PATCH_STRIP=-p1 from Makefile.