fixed a double-free that can happen if OpenMW exits prematurely (when OgreRenderer is deleted before CreateScene() was called)

ogre/renderer.cpp

@@ -13,7 +13,8 @@ using namespace OEngine::Render;
 
 void OgreRenderer::cleanup()
 {
-  delete mFader;
+  if (mFader)
+    delete mFader;
   
   if(mRoot)
     delete mRoot;

ogre/renderer.hpp

@@ -32,7 +32,7 @@ namespace Render
 
   public:
     OgreRenderer()
-      : mRoot(NULL), mWindow(NULL), mScene(NULL) {}
+      : mRoot(NULL), mWindow(NULL), mScene(NULL), mFader(NULL) {}
     ~OgreRenderer() { cleanup(); }
 
     /** Configure the renderer. This will load configuration files and