siglent-sds: incorrect g_array_free call

Since we are not keeping the array's data, arg must be TRUE to free it.

reported by Fr3ya on github as PR #207

Author: fenugrec

src/hardware/siglent-sds/protocol.c

@@ -412,10 +412,10 @@ static int siglent_sds_get_digital(const struct sr_dev_inst *sdi, struct sr_chan
 
 		/* Clear the buffers to prepare for the new samples */
 		if (ch->index < 8) {
-			g_array_free(data_low_channels, FALSE);
+			g_array_free(data_low_channels, TRUE);
 			data_low_channels = g_array_new(FALSE, FALSE, sizeof(uint8_t));
 		} else {
-			g_array_free(data_high_channels, FALSE);
+			g_array_free(data_high_channels, TRUE);
 			data_high_channels = g_array_new(FALSE, FALSE, sizeof(uint8_t));
 		}