Invalid parsing for Infinity with json-c 0.12

[jlguardi]

I've tested with json-c 0.12 and also with master code.

I've reduced the issue to this simple main.c:

#include <stdio.h>
#include <json-c/json.h>

int main(int n, char** v){
  char *str= "{ \"min\": Infinity, \"max\": -Infinity}";
  printf("%s\n", str);
  fprintf(stderr, "%p\n", json_tokener_parse(str));
  return 0;
}

json_tokener_parse doesn't parse correctly the second Infinity.

[hawicz]

Fixed on both branches.