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 mainargs1;

extern(C) int printf(char*,...);

void main(char[][] args)
{
    foreach(v; args)
    {
        printf("%.*s\n", v.length, v.ptr);
    }
}