Make handlers_lock a recursive mutex again to fix a deadlock during signal handling recently introduced. Pressing Ctrl-C works again.
Make handlers_lock a recursive mutex again to fix a deadlock during signal
handling recently introduced. Pressing Ctrl-C works again.

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