[Bug 27468] QQ International crashes when clicking on password form if dlls/user32/hook.c is build with -O2

http://bugs.winehq.org/show_bug.cgi?id=27468

Dan Kegel  changed:

What    |Removed                     |Added
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  Attachment #44214|0                           |1
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--- Comment #50 from Dan Kegel  2013-04-20 00:01:44 CDT ---
Created attachment 44223
  --> http://bugs.winehq.org/attachment.cgi?id=44223
Wrap hook proc in case it uses wrong calling convention

Jacek suggests it could be a calling convention mismatch... and sure enough,
the address of the local variable ret in call_hook_proc changes.
As Jacek suggests, the thing to do is insulate ourselves from the value of
SP on return from the proc, as in WINPROC_wrapper().
This patch works for me with QQ International on 32 bits.
Does it work for you, too?