bpo-33407: Implement Py_DEPRECATED() on MSVC (GH-8980)

diff --git a/Include/intrcheck.h b/Include/intrcheck.h
index 2e17336..e5bf5a8 100644
--- a/Include/intrcheck.h
+++ b/Include/intrcheck.h
@@ -15,7 +15,7 @@
 #endif
 #endif
 /* Deprecated, please use PyOS_AfterFork_Child() instead */
-PyAPI_FUNC(void) PyOS_AfterFork(void) Py_DEPRECATED(3.7);
+Py_DEPRECATED(3.7) PyAPI_FUNC(void) PyOS_AfterFork(void);
 
 #ifndef Py_LIMITED_API
 PyAPI_FUNC(int) _PyOS_IsMainThread(void);