make dingaling work with google voice inbound too

libs/libdingaling/src/libdingaling.c

@@ -2471,6 +2471,11 @@ int ldl_handle_running(ldl_handle_t *handle)
 }
 
 
+void ldl_session_set_gateway(ldl_session_t *session)
+{
+	ldl_set_flag(session, LDL_FLAG_GATEWAY);
+}
+
 int ldl_session_gateway(ldl_session_t *session)
 {
 	return ldl_test_flag(session, LDL_FLAG_GATEWAY) ? 1 : 0;

libs/libdingaling/src/libdingaling.h

@@ -593,6 +593,7 @@ ldl_status ldl_handle_init(ldl_handle_t **handle,
 void ldl_handle_run(ldl_handle_t *handle);
 
 int ldl_session_gateway(ldl_session_t *handle);
+void ldl_session_set_gateway(ldl_session_t *session);
 
 /*!
   \brief Stop a libDingaLing handle