FHEMWEB: avoid error-message when webCmd argument is space


git-svn-id: svn://svn.code.sf.net/p/fhem/code@4874 2b470e98-0d58-463d-a4d8-8e2adae1ed80
bugs fixed2

git-svn-id: svn://svn.code.sf.net/p/fhem/code@4875 2b470e98-0d58-463d-a4d8-8e2adae1ed80