unloadUnreferencedMaterials: Properly unload materials instead of removing techniques

extern/shiny/Main/Factory.cpp

@@ -803,7 +803,7 @@ namespace sh
 		for (MaterialMap::iterator it = mMaterials.begin(); it != mMaterials.end(); ++it)
 		{
 			if (it->second.getMaterial()->isUnreferenced())
-				it->second.destroyAll();
+				it->second.getMaterial()->unreferenceTextures();
 		}
 	}
 

extern/shiny/Main/Platform.hpp

@@ -69,6 +69,7 @@ namespace sh
 		virtual void removeAll () = 0; ///< remove all configurations
 
 		virtual bool isUnreferenced() = 0;
+		virtual void unreferenceTextures() = 0;
 		virtual void ensureLoaded() = 0;
 
 		virtual void setLodLevels (const std::string& lodLevels) = 0;

extern/shiny/Platforms/Ogre/OgreMaterial.cpp

@@ -35,6 +35,11 @@ namespace sh
 		return (!mMaterial.isNull() && mMaterial.useCount() <= Ogre::ResourceGroupManager::RESOURCE_SYSTEM_NUM_REFERENCE_COUNTS+1);
 	}
 
+	void OgreMaterial::unreferenceTextures()
+	{
+		mMaterial->unload();
+	}
+
 	OgreMaterial::~OgreMaterial()
 	{
 		if (!mMaterial.isNull())

extern/shiny/Platforms/Ogre/OgreMaterial.hpp

@@ -19,6 +19,7 @@ namespace sh
 		virtual bool createConfiguration (const std::string& name, unsigned short lodIndex);
 
 		virtual bool isUnreferenced();
+		virtual void unreferenceTextures();
 		virtual void ensureLoaded();
 
 		virtual void removeAll ();