D3D9: Fix issue where the shader caches were lost whenever the render window was resized. Add some error logging to LinearDiskCache. + some minor cleanup.

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@5747 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Plugins/Plugin_VideoDX9/Src/PixelShaderCache.h

@@ -54,11 +54,10 @@ private:
 
 	static PSCache PixelShaders;
 	static const PSCacheEntry *last_entry;
-
+	static void Clear();
 
 public:
 	static void Init();
-	static void Clear();
 	static void Shutdown();
 	static bool SetShader(bool dstAlpha);
 	static bool InsertByteCode(const PIXELSHADERUID &uid, const u8 *bytecode, int bytecodelen, bool activate);