libhb: eliminate refereces to libmkv


git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@6649 b64f7644-9d1e-0410-96f1-a4d463321fa5
cli: simplify setting geometry


git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@6650 b64f7644-9d1e-0410-96f1-a4d463321fa5