FIX: test for D3D11 in condition where DXSDK include path is added.  Thanks to Ident.
FIX: test for D3D11 in condition where DXSDK include path is added.  Thanks to Ident.

arkana-fts/cegui,cbeck88/cegui-mirror,RealityFactory/CEGUI,arkana-fts/cegui,RealityFactory/CEGUI,arkana-fts/cegui,arkana-fts/cegui,RealityFactory/CEGUI,RealityFactory/CEGUI,arkana-fts/cegui,RealityFactory/CEGUI,cbeck88/cegui-mirror,cbeck88/cegui-mirror,cbeck88/cegui-mirror,cbeck88/cegui-mirror