Put include guard to every header

* ensure include guard to every header
* comment endif guard block

Signed-off-by: Boris Barbulovski <bbarbulovski@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/display.h b/display.h
index 196338bb4..5068027ce 100644
--- a/display.h
+++ b/display.h
@@ -69,4 +69,4 @@ extern const char *default_dive_computer_device;
 }
 #endif
 
-#endif
+#endif // DISPLAY_H