[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 nested1;

void func(int i)
{
    (){
        assert(i == 3);
    }();
}

void main()
{
    func(3);
}