libhb: fix problem with logging of crop/scale settings


git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@5535 b64f7644-9d1e-0410-96f1-a4d463321fa5
cropscale: fix initial value of output width/height
Since all the frontends specifiy all parameters to the cropscale filter,
this really has no effect.  But it was incorrect...


git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@5536 b64f7644-9d1e-0410-96f1-a4d463321fa5