Fix coverity static analysis warning, allocate full ie structure

instead of without data buffer

(close issue ASTERISK-19674)
Reported by: Matt Jordan
Patches:
  ASTERISK-19674.patch (License #5415)
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Merged revisions 365143 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 365155 from http://svn.asterisk.org/svn/asterisk/branches/10


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@365157 65c4cc65-6c06-0410-ace0-fbb531ad65f3