utils-json: fix crash

Change-Id: Ie3f38f8c9c0449c3ea28eafec358bdc81ae40b32
Signed-off-by: José Bollo <jose.bollo@iot.bzh>

diff --git a/src/utils-json.c b/src/utils-json.c
index b3bee36..82908f4 100644 (file)
--- a/src/utils-json.c
+++ b/src/utils-json.c
@@ -83,7 +83,7 @@ int j_add(struct json_object *obj, const char *key, struct json_object *val)
 
 int j_add_string(struct json_object *obj, const char *key, const char *val)
 {
-       struct json_object *str = json_object_new_string (val);
+       struct json_object *str = json_object_new_string (val ? val : "");
        return str ? j_add(obj, key, str) : (errno = ENOMEM, 0);
 }