Programs that try to automatically calculate the radii of a target should no...

Programs that try to automatically calculate the radii of a target should no longer crash with certain invalid target names. This includes maptemplate and qmos. Fixes #1037.

PROG: Simplified some code in the control net reading code that was overly complicated due to not finding this bug earlier. References #1037.


git-svn-id: http://subversion.wr.usgs.gov/repos/prog/isis3/trunk@4617 41f8697f-d340-4b68-9986-7bafba869bb8