Cygheap page boundary allocation bug.

[Dave Korn]

On 11 December 2007 12:18, Dave Korn wrote:

>   Bug is present on, and patch applies cleanly to, both branch and trunk.
> 
> 2007-12-11  Dave Korn  <dave.korn>
> 
> 	* cygheap.cc (_csbrk):  Don't request zero bytes from VirtualAlloc,
> 	as windows treats that as an invalid parameter and returns an error.


  :-)  I just discovered this fixes

FAIL: pthread/cancel11.c (execute)


    cheers,
      DaveK
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