fhem.pl: do not report definition of one-time at as structure change

git-svn-id: svn://svn.code.sf.net/p/fhem/code/trunk@7706 2b470e98-0d58-463d-a4d8-8e2adae1ed80

fhem/fhem.pl

@@ -4081,7 +4081,7 @@ addStructChange($$$)
   return if(!$init_done);
 
   my ($cmd, $dev, $param) = @_;
-  return if(!$defs{$dev} || $defs{$dev}{TEMPORARY});
+  return if(!$defs{$dev} || $defs{$dev}{TEMPORARY} || $defs{$dev}{VOLATILE});
 
   $lastDefChange++;
   shift @structChangeHist if(@structChangeHist > 9);