https://github.com/json-c/json-c/issues/134

diff --git a/json_tokener.c b/json_tokener.c
index 19de8ef..9a76293 100644
--- a/json_tokener.c
+++ b/json_tokener.c
@@ -352,12 +352,10 @@ struct json_object* json_tokener_parse_ex(struct json_tokener *tok,
 
     case json_tokener_state_inf: /* aka starts with 'i' */
       {
-	int size;
 	int size_inf;
 	int is_negative = 0;
 
 	printbuf_memappend_fast(tok->pb, &c, 1);
-	size = json_min(tok->st_pos+1, json_null_str_len);
 	size_inf = json_min(tok->st_pos+1, json_inf_str_len);
 	char *infbuf = tok->pb->buf;
 	if (*infbuf == '-')