ntdll: Fixed some heap allocation stalls

[Matej Špindler]

On 03. 11. 2012 01:20, Dan Kegel wrote:
> Which game were you testing?
>
>
>
League of Legends has similar issues with memory allocation.

This patch does something similar:
http://uz.sns.it/~ranma42/iLoL/spectator-fix-v2/0001-ntdll-Improve-performace-of-heap-allocation-v2.patch

I have it in my tree since February and no problems so far.