Fix unused variable warning from previous commit.   https://tracker.physiomeproject.org/show_bug.cgi?id=1496
Fix unused variable warning from previous commit.   https://tracker.physiomeproject.org/show_bug.cgi?id=1496

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