cli.c: Fix tab completion "module load" when MALLOC_DEBUG is enabled.

r421600 conflicted with r155763.

ASTERISK-24348 #close
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Merged revisions 423657 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 423658 from http://svn.asterisk.org/svn/asterisk/branches/11
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Merged revisions 423659 from http://svn.asterisk.org/svn/asterisk/branches/12
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Merged revisions 423660 from http://svn.asterisk.org/svn/asterisk/branches/13


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@423661 65c4cc65-6c06-0410-ace0-fbb531ad65f3