Bug 828446 - [email/IMAP] timezone offset calculation breaks if timezone offset < -7 or > 7. will result in duplicate messages.
Merge pull request #113 from asutherland/tzoffset-parseint

Bug 828446 - [email/IMAP] timezone offset calculation breaks if timezone offset < -7 or > 7. will result in duplicate messages. r=squib, a=blocking-basecamp