Merged revisions 375863 via svnmerge from

Merged revisions 375863 via svnmerge from
file:///srv/subversion/repos/asterisk/branches/10

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  r375863 | rmudgett | 2012-11-05 15:39:00 -0600 (Mon, 05 Nov 2012) | 10 lines

  Add safety NULL pointer check in module user references.

  Made __ast_module_user_remove() check for NULL pointers.
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  Merged revision 375860 from C.3
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  Merged revisions 375862 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/10-digiumphones@375892 65c4cc65-6c06-0410-ace0-fbb531ad65f3