fixed a bug where using the VSI plugin could cause an accidental overwrite of...

fixed a bug where using the VSI plugin could cause an accidental overwrite of the previously saved script

refs #1614

git-svn-id: http://www.openflipper.org/svnrepo/OpenFlipper/branches/Free@16832 383ad7c9-94d9-4d36-a494-682f7c89f535