opus fix comment skipping code

opus requires the comment header to be a valid file our codec attemps to skip the comment data
in order to reduce the ram allocated originally it caused files with large album art to skip
the beginning of tracks my first attempt at fixing this then caused files with low bitrates
to do the same while fixing files with large album art

This patch should fix both although the initial start might be a bit slower but
this shouldn't cause too much of an issue

Change-Id: Ia1c3561347894cc45f24bb2659436914f8f03b43
1 file changed