ENIGMA2: fix integer check for msg command

git-svn-id: svn://svn.code.sf.net/p/fhem/code@5048 2b470e98-0d58-463d-a4d8-8e2adae1ed80
THZ: added german command-ref

git-svn-id: svn://svn.code.sf.net/p/fhem/code@5049 2b470e98-0d58-463d-a4d8-8e2adae1ed80