gc.c: event hook thread argument

* gc.c (gc_event_hook_body): move th to an argument.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@50395 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

gc.c

@@ -1654,15 +1654,14 @@ rb_objspace_set_event_hook(const rb_event_flag_t event)
 }
 
 static void
-gc_event_hook_body(rb_objspace_t *objspace, const rb_event_flag_t event, VALUE data)
+gc_event_hook_body(rb_thread_t *th, rb_objspace_t *objspace, const rb_event_flag_t event, VALUE data)
 {
-    rb_thread_t *th = GET_THREAD();
     EXEC_EVENT_HOOK(th, event, th->cfp->self, 0, 0, data);
 }
 
 #define gc_event_hook(objspace, event, data) do { \
     if (UNLIKELY((objspace)->hook_events & (event))) { \
-	gc_event_hook_body((objspace), (event), (data)); \
+	gc_event_hook_body(GET_THREAD(), (objspace), (event), (data)); \
     } \
 } while (0)