buffer: Free attributes list when destroying buffer

Free the attributes list, so that we don't leak memory.

Signed-off-by: Paul Cercueil <[email protected]>

Author: pcercuei

buffer.c

@@ -195,6 +195,7 @@ void iio_buffer_destroy(struct iio_buffer *buf)
 	iio_task_destroy(buf->worker);
 	iio_mutex_destroy(buf->lock);
 	iio_channels_mask_destroy(buf->mask);
+	free(buf->attrlist.attrs);
 	free(buf);
 }