2008-06-02  Guillaume SADEGH  <sadegh@lrde.epita.fr>

        * iface/nips/nipstest/Makefile.am, iface/nips/Makefile.am,
        configure.ac, iface/nips/nipstest/emptiness.test,
        iface/nips/nipstest/dotty.test: Test suite for the NipsVM
        front-end.
        * iface/nips/emptiness_check.cc, iface/nips/dottynips.cc:
        `catch'
        don't throw anymore an exception, but exit with 1.
        * iface/nips/common.cc, iface/nips/nips.cc (nips_interface):
        Change messages of nips_exception.