[svn r330] Implemented synchronized statements. Changed the tryfinally handlers to a more generalized EnclosingHandler. Changed ClassInfoS to be mutable so they can be used as locks. Added new BB after throw ala return/break etc.

module bug78;

void main()
{
    typedef int int_t = 42;
    int_t i;
    assert(i == int_t.init);
}