Check for NULL pointer.
Check for NULL pointer.

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