From 4eb2b32310e405ed425fdc0f42cc7668d43a01a8 Mon Sep 17 00:00:00 2001
From: Abdelatif Guettouche <abdelatif.guettouche@espressif.com>
Date: Fri, 4 Dec 2020 16:44:58 +0000
Subject: [PATCH] include/nuttx/sensors/hts221.h: Forward reference i2c_master
 to avoid any warning.

Signed-off-by: Abdelatif Guettouche <abdelatif.guettouche@espressif.com>
---
 include/nuttx/sensors/hts221.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/nuttx/sensors/hts221.h b/include/nuttx/sensors/hts221.h
index 1b9ddc56251..a53c5ceedb1 100644
--- a/include/nuttx/sensors/hts221.h
+++ b/include/nuttx/sensors/hts221.h
@@ -52,6 +52,8 @@
  * Public Types
  ****************************************************************************/
 
+struct i2c_master_s; /* Forward reference */
+
 /* Number of temperature samples */
 
 typedef enum hts221_avrg_temp_e