[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 tangotests.debug3;

void main()
{
    int i = 42;
    int* ip = &i;

    int* fail;
    *fail = 0;
}