Enable auto-selection of omxil_vout

Hi Julian and thank you for your vlc-omx efforts.
With its help I have solved problem of my customer. The problem was just to enable playback of H.264 HD video with VLC on Raspberry Pi. I have tried VLC master HEAD revision at 17 september, and it haven't worked with omxil codec and vout, it just have given me incomplete first frame and freezed. Then I have built VLC from your vlc-omx fork and it have worked just fine.
The only thing I had to do to completely satisfy customer was to change omxil-vout capability score from 0 to non-zero to make it usable without special option setting. So I'd like to suggest you to do the same thing, because from my experience it is indeed usable and should be accessible easily for user.
Thank you again.