[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 bug18;

struct S {
    int[9] i;
}

void main()
{
    int[9] i;
    auto s = S(i);
}