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


git-svn-id: http://svn.asterisk.org/svn/asterisk/branches/11@423658 f38db490-d61c-443f-a65b-d21fe96a405b