MacGui: fix crash in PictureController.

For some reason, it only crashed in debug builds, but de-referencing fTitle before it's been set (e.g. indirectly from awakeFromNib) is obviously wrong.



git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@5341 b64f7644-9d1e-0410-96f1-a4d463321fa5