Fixed a bug causing image field to take only positive double for minimum and maximum options, they should take any non-negative value. https://tracker.physiomeproject.org/show_bug.cgi?id=3260
Fixed a bug causing image field to take only positive double for minimum and maximum options, they should take any non-negative value. https://tracker.physiomeproject.org/show_bug.cgi?id=3260

cmiss/cmgui,cmiss/cmgui