-static int scpi_usbtmc_libusb_source_add(void *priv, int events, int timeout,
- sr_receive_data_callback cb, void *cb_data)
+static int scpi_usbtmc_libusb_source_add(struct sr_session *session,
+ void *priv, int events, int timeout, sr_receive_data_callback cb,
+ void *cb_data)