voodoo: Fix crash in manager on disconnect.
voodoo: Fix crash in manager on disconnect.

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