FB7490 install: fix errormessages at install


git-svn-id: svn://svn.code.sf.net/p/fhem/code@4900 2b470e98-0d58-463d-a4d8-8e2adae1ed80
rain sens after FHEM restart

git-svn-id: svn://svn.code.sf.net/p/fhem/code@4901 2b470e98-0d58-463d-a4d8-8e2adae1ed80
git-svn-id: svn://svn.code.sf.net/p/fhem/code@4902 2b470e98-0d58-463d-a4d8-8e2adae1ed80
git-svn-id: svn://svn.code.sf.net/p/fhem/code@4903 2b470e98-0d58-463d-a4d8-8e2adae1ed80