From 9765cfab7747c4d9435ec16a5fe29affeb2e52a7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
Date: Sat, 12 Oct 2013 13:43:07 -0400
Subject: [PATCH] Make sure that we don't dereference NULL

The code was actually safe, because b should
never be null, because if rvalue is empty, a different
branch is taken. But we *do* check for NULL in the
loop above, so it's better to also check here for symmetry.
---
 src/core/load-fragment.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/core/load-fragment.c b/src/core/load-fragment.c
index 44920d6..f01843d 100644
--- a/src/core/load-fragment.c
+++ b/src/core/load-fragment.c
@@ -1860,7 +1860,8 @@ int config_parse_documentation(const char *unit,
                         free(*a);
                 }
         }
-        *b = NULL;
+        if (b)
+                *b = NULL;
 
         return r;
 }