Modified an if (...<...) to be more robust to avoid cases were some systems...

Modified an if (...<...) to be more robust to avoid cases were some systems were saying less than and others not, only really fixed the need for ostruthdata for samson

git-svn-id: http://subversion.wr.usgs.gov/repos/prog/isis3/trunk@1954 41f8697f-d340-4b68-9986-7bafba869bb8