[PATCH] windef.h: Don't define __thiscall and __fastcall on MSVC.

[Jacek Caban]

They are keywords.

Signed-off-by: Jacek Caban <jacek(a)codeweavers.com>
---
  include/windef.h | 4 ++--
  1 file changed, 2 insertions(+), 2 deletions(-)