Prevent application exit on D-Bus connection lost

By default libdbus library sets exit-on-disconnect flag, which results
in exit(1) being called in case of D-Bus connection lost. But, for our
purpose such behavior is not desired, because it might cause unexpected
application exit without an apparent reason. Client which uses ALSA API
should decide by itself what to do if BT device is not available any
more.

src/shared/dbus-client.c

@@ -67,6 +67,9 @@ dbus_bool_t bluealsa_dbus_connection_ctx_init(
 	if ((ctx->conn = dbus_bus_get_private(DBUS_BUS_SYSTEM, error)) == NULL)
 		return FALSE;
 
+	/* do not terminate in case of D-Bus connection being lost */
+	dbus_connection_set_exit_on_disconnect(ctx->conn, FALSE);
+
 	if (!dbus_connection_set_watch_functions(ctx->conn, ba_dbus_watch_add,
 				ba_dbus_watch_del, ba_dbus_watch_toggled, ctx, NULL)) {
 		dbus_set_error(error, DBUS_ERROR_NO_MEMORY, NULL);