[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 bug39;

struct S
{
    long l;
}

void main()
{
    S s;
    s.l = 23;
    void* p = &s;
}