Fix unrelated compilation warning highlighted by Mac OS X 10.9 after last commit. https://tracker.physiomeproject.org/show_bug.cgi?id=3490
Fix unrelated compilation warning highlighted by Mac OS X 10.9 after last commit. https://tracker.physiomeproject.org/show_bug.cgi?id=3490

OpenCMISS/zinc,hsorby/zinc,hsorby/zinc,hsorby/zinc,OpenCMISS/zinc,OpenCMISS/zinc,hsorby/zinc,OpenCMISS/zinc