MacGui: fix denies in preview jobs.

git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@6385 b64f7644-9d1e-0410-96f1-a4d463321fa5
libhb: fix mp4 optimize

movflags were being overwritten, silly error on my part.


git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@6386 b64f7644-9d1e-0410-96f1-a4d463321fa5