[Bug 39734] ProtectDisc Driver 11: acedrv11.sys crashes

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=39734

--- Comment #1 from Bernhard Übelacker <bernhardu at vr-web.de> ---
Created attachment 52987
  --> https://bugs.winehq.org/attachment.cgi?id=52987
ntoskrnl.exe: Avoid crash in acedrv11.sys.

A +ntoskrnl trace shows such a line:
  trace:ntoskrnl:IoAllocateIrp -128, 0

With the attached patch the driver does at least not crash.
- It just casts the negative stack_size to an unsigned char in
  IoAllocateIrp and IoInitializeIrp.
- Returns in IoCallDriver on NULL despatch function.

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