That's probably because the code in the article uses compile-time constants as operands. Try this one and pass "-1" as the command-line parameter:

  int main(int argc, char *argv[]) { return (1LL << 63) / atoi(argv[1]); }

Note that this issue has been written about before by Tavis Ormandy: http://my.opera.com/taviso/blog/show.dml/639454