Simple removal of a couple of scope levels in Mac OS X object frame event handling code. No bug. r=roc

layout/generic/nsObjectFrame.cpp

@@ -4426,13 +4426,17 @@ nsEventStatus nsPluginInstanceOwner::ProcessEvent(const nsGUIEvent& anEvent)
     return nsEventStatus_eIgnore;
 
 #ifdef XP_MACOSX
-  if (mWidget) {
+  if (!mWidget)
+    return nsEventStatus_eIgnore;
+
   // we never care about synthesized mouse enter
   if (anEvent.message == NS_MOUSE_ENTER_SYNTH)
     return nsEventStatus_eIgnore;
 
   nsCOMPtr<nsIPluginWidget> pluginWidget = do_QueryInterface(mWidget);
-    if (pluginWidget && NS_SUCCEEDED(pluginWidget->StartDrawPlugin())) {
+  if (!pluginWidget || NS_FAILED(pluginWidget->StartDrawPlugin()))
+    return nsEventStatus_eIgnore;
+
   NPEventModel eventModel = GetEventModel();
 
   // If we have to synthesize an event we'll use one of these.
@@ -4574,8 +4578,6 @@ nsEventStatus nsPluginInstanceOwner::ProcessEvent(const nsGUIEvent& anEvent)
     rv = nsEventStatus_eConsumeNoDefault;
 
   pluginWidget->EndDrawPlugin();
-    }
-  }
 #endif
 
 #ifdef XP_WIN