[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 structs6;

struct S
{
    float f;
}

void func(S s)
{
}

void main()
{
    func(S());
}