Fix :update_assets_version usage with SVN
Fix :update_assets_version usage with SVN

When used with Subversion real_revision is Fixnum so this code fails with:

    wrong number of arguments (2 for 1) (ArgumentError)

This patch fixes it.
pedroresende/capifony,trsteel88/capifony,korobi/capifony,pimolo/capifony,trsteel88/capifony,jeroendesloovere/capifony,24HOURSMEDIA/capifony,korobi/capifony,pedroresende/capifony,pimolo/capifony,shipci/capifony,24HOURSMEDIA/capifony,everzet/capifony,everzet/capifony,jeroendesloovere/capifony,shipci/capifony