Fix script error reported here:
http://tortoisesvn.tigris.org/ds/viewMessage.do?dsForumId=4061&dsMessageId=3053016

git-svn-id: http://tortoisesvn.googlecode.com/svn/trunk/contrib@24102 4cfb86a4-2c7a-11df-bd14-c1e331e6ceac