Make all sizeof() consistently use parenthesis.

src/hardware/sysclk-lwla/api.c

@@ -264,7 +264,7 @@ static int drain_usb(struct sr_usb_dev_inst *usb, unsigned int endpoint)
 	do {
 		xfer_len = 0;
 		ret = libusb_bulk_transfer(usb->devhdl, endpoint,
-					   buf, sizeof buf, &xfer_len,
+					   buf, sizeof(buf), &xfer_len,
 					   drain_timeout_ms);
 		drained += xfer_len;
 	} while (ret == LIBUSB_SUCCESS && xfer_len != 0);

src/session_file.c

@@ -278,7 +278,7 @@ SR_API int sr_session_load(struct sr_context *ctx, const char *filename,
 					sr_config_set(sdi, NULL, SR_CONF_NUM_LOGIC_CHANNELS,
 							g_variant_new_int32(total_channels));
 					for (k = 0; k < total_channels; k++) {
-						g_snprintf(channelname, sizeof channelname,
+						g_snprintf(channelname, sizeof(channelname),
 								"%d", k);
 						sr_channel_new(sdi, k, SR_CHANNEL_LOGIC,
 								FALSE, channelname);