Fix issue with inability to cancell call transfer made by on-sceen menus.

Reported by: Igor Olhovskiy
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Merged revisions 393395 from http://svn.asterisk.org/svn/asterisk/branches/11


git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@393396 f38db490-d61c-443f-a65b-d21fe96a405b