Use the FREE_AND_SET_NULL macro where appropriate

src/mystery_gift_view.c

@@ -207,8 +207,7 @@ void WonderCard_Destroy(void)
     if (sWonderCardData != NULL)
     {
         *sWonderCardData = (struct WonderCardData){};
-        Free(sWonderCardData);
-        sWonderCardData = NULL;
+        FREE_AND_SET_NULL(sWonderCardData);
     }
 }
 
@@ -660,8 +659,7 @@ void WonderNews_Destroy(void)
     if (sWonderNewsData != NULL)
     {
         *sWonderNewsData = (struct WonderNewsData){};
-        Free(sWonderNewsData);
-        sWonderNewsData = NULL;
+        FREE_AND_SET_NULL(sWonderNewsData);
     }
 }