remove signal handlers in deinitialization, fixes the following bug message:
remove signal handlers in deinitialization, fixes the following bug message:

(!) --->  CAUGHT SIGNAL 2  <---
 (!?!)  *** BUG ALERT [vt_close() multiple times] *** vt.c (77)

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