VimsGroundMap.h: 2011-10-19 Steven Lambright - Added common sense check to...

VimsGroundMap.h: 2011-10-19 Steven Lambright - Added common sense check to constructor to at least provide a string explanation for why their program is going to crash when the original cube makes no sense. Since the exception is in the constructor the error will probably lead to an alternate seg fault. 

git-svn-id: http://subversion.wr.usgs.gov/repos/prog/isis3/trunk@3622 41f8697f-d340-4b68-9986-7bafba869bb8