Replace excessive assert calls with assertGreater. https://tracker.physiomeproject.org/show_bug.cgi?id=3824
Replace excessive assert calls with assertGreater. https://tracker.physiomeproject.org/show_bug.cgi?id=3824

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