Removed additional unnecessary pointers and fixed another memory leak. Tested...

Removed additional unnecessary pointers and fixed another memory leak. Tested on prog6 and prog15 ~1000 times against truth data.

git-svn-id: http://subversion.wr.usgs.gov/repos/prog/isis3/trunk@6021 41f8697f-d340-4b68-9986-7bafba869bb8