When writing a file, don't back it up if a backup already exists for that file.
When writing a file, don't back it up if a backup already exists for that file.


git-svn-id: 884a03e47e2adb735d896e55bb5ad6bc3421ba19@14548 4e558342-562e-0410-864c-e07659590f8c

efajardo/osg-test,efajardo/osg-test