airmon-zc fix typo reported by sh4rm4

git-svn-id: http://svn.aircrack-ng.org/trunk@2411 28c6078b-6c39-48e3-add9-af49d547ecab
revert accidental staged changes from previous commit

git-svn-id: http://svn.aircrack-ng.org/trunk@2412 28c6078b-6c39-48e3-add9-af49d547ecab