Fixes issue rolandleth/LTHPasscodeViewController#72

[[UIApplication sharedApplication] statusBarFrame].size.height returns 1024 in lanscape (iOS7.1). This caused the passcode view to be off screen. I didn't test this change on iOS6.
Merge pull request #75 from mgratzer/master

Fixes issue rolandleth/LTHPasscodeViewController#72