erica/iOS-6-Advanced-Cookbook — pull request #1 by huhitschris (2013-03-08 06:17:02+00:00)
Title: Patch to fix crashes caused by ABMultivalueCopyLabelAtIndex returning null

ABMultivalueCopyLabelAtIndex may return null. Null values cannot be
added to an NSMutableArray. This patch checks for null values and
inserts an empty string instead to avoid a potential crash.