Use dfb_gfxcard_lock() in dfb_gfxcard_shutdown(). Removed workaround that was needed because of lacking support for recursive locks.
Use dfb_gfxcard_lock() in dfb_gfxcard_shutdown(). Removed workaround that
was needed because of lacking support for recursive locks.

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