Handle NULL gracefully in json_tokener_free

Similarly to glibc's free, make json_tokener_free(NULL)
a no-op, to simplify cleanup paths.

Signed-off-by: Ján Tomko <jtomko@redhat.com>

diff --git a/json_tokener.c b/json_tokener.c
index c831f8a5d31c4719ae14743cb5a6d584ba046238..4453c89714e3ee71bda9ec97cb94a989bb0577a2 100644 (file)
--- a/json_tokener.c
+++ b/json_tokener.c
@@ -182,6 +182,8 @@ struct json_tokener *json_tokener_new(void)
 
 void json_tokener_free(struct json_tokener *tok)
 {
+       if (!tok)
+               return;
        json_tokener_reset(tok);
        if (tok->pb)
                printbuf_free(tok->pb);