Change default renderer for Win8 to DX11.

src/config.h

@@ -6,6 +6,8 @@
 #ifndef __CONFIG_H__
 #define __CONFIG_H__
 
+
+
 #if !defined(BGFX_CONFIG_RENDERER_DIRECT3D9) \
 	&& !defined(BGFX_CONFIG_RENDERER_DIRECT3D11) \
 	&& !defined(BGFX_CONFIG_RENDERER_OPENGL) \
@@ -15,13 +17,14 @@
 
 #	ifndef BGFX_CONFIG_RENDERER_DIRECT3D9
 #		define BGFX_CONFIG_RENDERER_DIRECT3D9 (0 \
-					| BX_PLATFORM_WINDOWS \
+					| (BX_PLATFORM_WINDOWS && _WIN32_WINNT < 0x0602 /*_WIN32_WINNT_WIN8*/) \
 					| BX_PLATFORM_XBOX360 \
 					)
 #	endif // BGFX_CONFIG_RENDERER_DIRECT3D9
 
 #	ifndef BGFX_CONFIG_RENDERER_DIRECT3D11
 #		define BGFX_CONFIG_RENDERER_DIRECT3D11 (0 \
+					| (BX_PLATFORM_WINDOWS && _WIN32_WINNT >= 0x0602 /*_WIN32_WINNT_WIN8*/) \
 					)
 #	endif // BGFX_CONFIG_RENDERER_DIRECT3D11