From 7bceed40712ba229c577909e27c8f33892fc8180 Mon Sep 17 00:00:00 2001
From: William Woodall <william@osrfoundation.org>
Date: Wed, 16 Dec 2015 15:00:52 -0800
Subject: [PATCH] fix style

---
 rcl/src/rcl/common.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/rcl/src/rcl/common.h b/rcl/src/rcl/common.h
index 2b2d5f7..e5c8027 100644
--- a/rcl/src/rcl/common.h
+++ b/rcl/src/rcl/common.h
@@ -26,10 +26,11 @@ extern "C"
 #define RCL_CHECK_ARGUMENT_FOR_NULL(argument, error_return_type) \
   RCL_CHECK_FOR_NULL_WITH_MSG(argument, #argument " argument is null", return error_return_type)
 
-#define RCL_CHECK_FOR_NULL_WITH_MSG(value, msg, error_statement) if (!value) { \
+#define RCL_CHECK_FOR_NULL_WITH_MSG(value, msg, error_statement) \
+  if (!(value)) { \
     RCL_SET_ERROR_MSG(msg); \
     error_statement; \
-}
+  }
 
 /// Retrieve the value of the given environment variable if it exists, or "".
 /* The returned cstring is only valid until the next time this function is