osc: Use device ID when name or label fails

The following error message was being displayed at startup:
CRITICAL **: rx_update_device_sampling_freq: assertion 'device' failed

This was due to the existence of:
/sys/bus/iio/device/iio_sysfs_trigger
which doesn't have the 'name' attribute.

Signed-off-by: Dan Nechita <[email protected]>

Author: dNechita

Diff for: osc.c

@@ -1830,7 +1830,8 @@ static void init_device_list(struct iio_context *_ctx)
 		}
 
 		rx_update_device_sampling_freq(
-			get_iio_device_label_or_name(dev), USE_INTERN_SAMPLING_FREQ);
+			get_iio_device_label_or_name(dev) ?: iio_device_get_id(dev),
+			USE_INTERN_SAMPLING_FREQ);
 	}
 }