- fixed update check for shadow map tree.

This should only flag the tree as new if it is different from the last one.
This not only caused issues with dynamic updates but also made the renderer recreate the tree's data structures repeatedly.

src/common/rendering/hwrenderer/data/hw_shadowmap.h

@@ -35,10 +35,13 @@ public:
 	}
 
 	void SetAABBTree(hwrenderer::LevelAABBTree* tree)
+	{
+		if (mAABBTree != tree)
 		{
 			mAABBTree = tree;
 			mNewTree = true;
 		}
+	}
 
 	void SetCollectLights(std::function<void()> func)
 	{