Bugfix 11285

On iOS7 devices, the [UITextView font] method returned nil if no text had yet been added to the control so attempts to get font size were ignored. A check has now been added for this condition and the system font of the appropriate size is used if a custom font has not been set.
Add missing bug note
Merge branch 'bugfix-11285' of https://github.com/runrevfraser/livecode into bugfix-11285
Merge branch 'bugfix-11285' into release-6.1.3