FIX: Minor tweak so things work correctly when using premake 3.7.
FIX: Minor tweak so things work correctly when using premake 3.7.

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