[Bug 58000] New thread stack uses too much memory

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=58000

--- Comment #3 from Piotr Caban  ---
Here's the info I have received:
 - the system has 2GB of RAM
 - non-wine components are using ~700MB
 - old wine without 3863b243fe5ef4e223a809e93a85e858952dd754 commit uses ~500MB
 - the application starts over 1k wine threads

Unfortunately I didn't get memory usage with current wine but I guess it's
something around 700+500+1000*0.9 = 2100. I guess that reducing zeroed area
size by ~10-20% should do the job (unless there's a better solution).