Code review comment for lp:~unity-team/unity/unity-sru-fix-mem-leaks

See also similar fixes are required for PanelController:
http://bazaar.launchpad.net/~vanvugt/+junk/unity/revision/87#src/PanelController.cpp

I know there are more such leaks to fix but never bothered committing the fixes. It really should be an exercise it ticking off a list of valgrind results in a new bug later on.