pear/Net_IPv4 — pull request #1 by ando-masaki (2013-11-22 07:55:34+00:00)
Title: Update IPv4.php

Fixed following bug.

PHP Error: Notice - Undefined index: Net_IPv4_Netmask_Map File Path: Net/IPv4.php (line: 267)

I discovered this bug when I was testing with phpunit.