Fix some memory leaks in GetRevAvailableHandlers
Merge branch 'refactor-syntax_unicode' of https://www.github.com/runrev/livecode into refactor-syntax_unicode
[[ Bug 12288 ]] Prevent rect width and height underflow
Merge pull request #729 from runrevali/bugfix-12288

[[ Bug 12288 ]] Prevent rect width and height underflow