Fix bug with geoming which caused seg fault and bug when which did not allow...

Fix bug with geoming which caused seg fault and bug when which did not allow measures to be unlocked.  Fixes #328, #730, #792

git-svn-id: http://subversion.wr.usgs.gov/repos/prog/isis3/trunk@4311 41f8697f-d340-4b68-9986-7bafba869bb8