Bugfix: Exception handlers are *not* WINAPI.

diff --git a/include/winnt.h b/include/winnt.h
index db0e2bd..fd62044 100644
--- a/include/winnt.h
+++ b/include/winnt.h
@@ -708,8 +708,8 @@
 
 struct __EXCEPTION_FRAME;
 
-typedef DWORD (CALLBACK *PEXCEPTION_HANDLER)(PEXCEPTION_RECORD,struct __EXCEPTION_FRAME*,
-                                             PCONTEXT,struct __EXCEPTION_FRAME **);
+typedef DWORD (*PEXCEPTION_HANDLER)(PEXCEPTION_RECORD,struct __EXCEPTION_FRAME*,
+                                    PCONTEXT,struct __EXCEPTION_FRAME **);
 
 typedef struct __EXCEPTION_FRAME
 {