[Modify] Polish it

websocket-sharp/Ext.cs

@@ -1317,10 +1317,13 @@ namespace WebSocketSharp
     /// The type of the event data generated by the event.
     /// </typeparam>
     public static void Emit<TEventArgs> (
-      this EventHandler<TEventArgs> eventHandler, object sender, TEventArgs e)
+      this EventHandler<TEventArgs> eventHandler, object sender, TEventArgs e
+    )
       where TEventArgs : EventArgs
     {
-      if (eventHandler != null)
+      if (eventHandler == null)
+        return;
+
       eventHandler (sender, e);
     }