D3D: Fix 8-bit signed normals. Fixes lighting problems in Super Smash Bros Melee. misc tiny things

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@4265 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Core/VideoCommon/Src/VideoConfig.h

@@ -131,6 +131,9 @@ struct VideoConfig
 	// With this enabled, the plugin renders directly to the backbuffer. Many features are
 	// disabled but it might be faster on really old GPUs.
 	bool bSimpleFB;
+
+	// Static config per API
+	bool bAllowSignedBytes;
 };
 
 extern VideoConfig g_Config;