don't remove snets if the project isn't prepared
don't remove snets if the project isn't prepared

svn path=/trunk/; revision=1114

swesterfeld/beast,swesterfeld/beast,GNOME/beast,GNOME/beast,GNOME/beast,tim-janik/beast,tim-janik/beast,GNOME/beast,tim-janik/beast,tim-janik/beast,swesterfeld/beast,GNOME/beast,swesterfeld/beast,GNOME/beast,tim-janik/beast,tim-janik/beast,swesterfeld/beast,swesterfeld/beast,swesterfeld/beast,tim-janik/beast,GNOME/beast