src: use nullptr in node_buffer.cc

Signed-off-by: gengjiawen <[email protected]>

PR-URL: #25820
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Richard Lau <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>

src/node_buffer.cc

@@ -99,7 +99,7 @@ class CallbackInfo {
                                   Local<ArrayBuffer> object,
                                   FreeCallback callback,
                                   char* data,
-                                  void* hint = 0);
+                                  void* hint = nullptr);
  private:
   static void WeakCallback(const WeakCallbackInfo<CallbackInfo>&);
   inline void WeakCallback(Isolate* isolate);