Fixed qview crash problem when 2D spatial profile is used without defining a...

Fixed qview crash problem when 2D spatial profile is used without defining a profile. Fixes #1921 and #1950.

git-svn-id: http://subversion.wr.usgs.gov/repos/prog/isis3/trunk@5913 41f8697f-d340-4b68-9986-7bafba869bb8