fusionsound/core: fix deadlock during shutdown
fusionsound/core: fix deadlock during shutdown

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