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 imports_1of2;

import imports_2of2;

void main()
{
    assert(func() == 42);
    S s;
    s.l = 32;
    assert(s.l == 32);
}