Fix an invalid enum member usage that MSVC thought it's good
Fix an invalid enum member usage that MSVC thought it's good

--HG--
branch : gui_navigation-devel

cbeck88/cegui-mirror-two,cbeck88/cegui-mirror-two,cbeck88/cegui-mirror-two,cbeck88/cegui-mirror-two,cbeck88/cegui-mirror-two