FB_CALLMONITOR: fix "use of uninitialized value" message

git-svn-id: svn://svn.code.sf.net/p/fhem/code@4367 2b470e98-0d58-463d-a4d8-8e2adae1ed80
FB_CALLMONITOR: removing irritating event placeholders from commandref


git-svn-id: svn://svn.code.sf.net/p/fhem/code@4368 2b470e98-0d58-463d-a4d8-8e2adae1ed80