Update copyright year to 2013 in asterisk.c; some whitespace fixes

(closes issue ASTERISK-22179)
Reported by: Malcolm Davenport
........

Merged revisions 395032 from http://svn.asterisk.org/svn/asterisk/branches/1.8


git-svn-id: http://svn.asterisk.org/svn/asterisk/branches/11@395033 f38db490-d61c-443f-a65b-d21fe96a405b