iio: chemical: bme680: use s16 variable for temp value to avoid casting

Use local s16 variable for the temperature channel to avoid casting it
later before passing it to the bme680_read_temp() function. This way,
possible endianness and initialization issues are avoided.

Signed-off-by: Vasileios Amoiridis <vassilisamir@gmail.com>
Link: https://patch.msgid.link/20241030235424.214935-2-vassilisamir@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/chemical/bme680_core.c

@@ -741,6 +741,7 @@ static int bme680_read_raw(struct iio_dev *indio_dev,
 {
 	struct bme680_data *data = iio_priv(indio_dev);
 	int chan_val, ret;
+	s16 temp_chan_val;
 
 	guard(mutex)(&data->lock);
 
@@ -757,11 +758,11 @@ static int bme680_read_raw(struct iio_dev *indio_dev,
 	case IIO_CHAN_INFO_PROCESSED:
 		switch (chan->type) {
 		case IIO_TEMP:
-			ret = bme680_read_temp(data, (s16 *)&chan_val);
+			ret = bme680_read_temp(data, &temp_chan_val);
 			if (ret)
 				return ret;
 
-			*val = chan_val * 10;
+			*val = temp_chan_val * 10;
 			return IIO_VAL_INT;
 		case IIO_PRESSURE:
 			ret = bme680_read_press(data, &chan_val);