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

(closes issue ASTERISK-22179)
Reported by: Malcolm Davenport
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Merged revisions 395032 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 395033 from http://svn.asterisk.org/svn/asterisk/branches/11


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@395034 65c4cc65-6c06-0410-ace0-fbb531ad65f3