[PATCH 2/5] librte_kvargs: make rte_kvargs_free() be consistent with other "free()" functions

[Pawel Wodkowski <pawelx.wodkowski-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>]

It is desired that all type of *_free() functions mimic behaviour of
libc free() function. This function does nothing if given parameter is
NULL. This patch add this behaviour for rte_kvargs_free().

Signed-off-by: Pawel Wodkowski <pawelx.wodkowski-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
---
 lib/librte_kvargs/rte_kvargs.c | 4 ++++
 lib/librte_kvargs/rte_kvargs.h | 3 ++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/lib/librte_kvargs/rte_kvargs.c b/lib/librte_kvargs/rte_kvargs.c
index 8bc1e46..c2dd051 100644
--- a/lib/librte_kvargs/rte_kvargs.c
+++ b/lib/librte_kvargs/rte_kvargs.c
@@ -174,8 +174,12 @@ rte_kvargs_process(const struct rte_kvargs *kvlist,
 void
 rte_kvargs_free(struct rte_kvargs *kvlist)
 {
+	if (!kvlist)
+		return;
+
 	if (kvlist->str != NULL)
 		free(kvlist->str);
+
 	free(kvlist);
 }
 
diff --git a/lib/librte_kvargs/rte_kvargs.h b/lib/librte_kvargs/rte_kvargs.h
index ef4efab..ae9ae79 100644
--- a/lib/librte_kvargs/rte_kvargs.h
+++ b/lib/librte_kvargs/rte_kvargs.h
@@ -115,7 +115,8 @@ void rte_kvargs_free(struct rte_kvargs *kvlist);
  *
  * For each key/value association that matches the given key, calls the
  * handler function with the for a given arg_name passing the value on the
- * dictionary for that key and a given extra argument.
+ * dictionary for that key and a given extra argument. If *kvlist* is NULL
+ * function does nothing.
  *
  * @param kvlist
  *   The rte_kvargs structure
-- 
1.9.1