Fixed a critical bug in the runtime, where _d_allocmemoryT would mark the memory block as having pointers (for scanning) opposite of what it should. So pointers would not be seen and freed. Should fix a bunch of regressions with AAs.

module nested1;

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

void main()
{
    func(3);
}