IDirectFBSurface: Fix warning in IDirectFBSurface_Layer_GetStereoEye().
IDirectFBSurface: Fix warning in IDirectFBSurface_Layer_GetStereoEye().

sklnet/DirectFB,Distrotech/DirectFB,lancebaiyouview/DirectFB,kevleyski/directfb,Distrotech/DirectFB,kevleyski/directfb,deniskropp/DirectFB,dfbdok/DirectFB1,Distrotech/DirectFB,kevleyski/DirectFB-1,kevleyski/directfb,DirectFB/directfb,lancebaiyouview/DirectFB,djbclark/directfb-core-DirectFB,deniskropp/DirectFB,jcdubois/DirectFB,kevleyski/DirectFB-1,DirectFB/directfb,kevleyski/DirectFB-1,kaostao/directfb,djbclark/directfb-core-DirectFB,kevleyski/directfb,deniskropp/DirectFB,jcdubois/DirectFB,mtsekm/test,sklnet/DirectFB,djbclark/directfb-core-DirectFB,mtsekm/test,sklnet/DirectFB,deniskropp/DirectFB,djbclark/directfb-core-DirectFB,dfbdok/DirectFB1,jcdubois/DirectFB,DirectFB/directfb,lancebaiyouview/DirectFB,kevleyski/DirectFB-1,lancebaiyouview/DirectFB,sklnet/DirectFB,mtsekm/test,dfbdok/DirectFB1,kaostao/directfb,kaostao/directfb