Eliminate some more unnecessary RAII_VAR() uses.

RAII_VAR() is not a hammer appropriate to pound all nails.
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Merged revisions 412413 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@412414 f38db490-d61c-443f-a65b-d21fe96a405b