backup: bug when using backupcmd fixed

git-svn-id: svn://svn.code.sf.net/p/fhem/code/trunk@3391 2b470e98-0d58-463d-a4d8-8e2adae1ed80

fhem/FHEM/98_backup.pm

@@ -173,8 +173,10 @@ createArchiv($)
 
     # prevents tar's output of "Removing leading /" and return total bytes of archive
     $cmd = "tar -$tarOpts - @pathname |gzip > $backupdir/FHEM-$dateTime.tar.gz";
+
   } else {
-    $ret = "$backupcmd \"@pathname\"";
+    $cmd = "$backupcmd \"@pathname\"";
+
   }
   Log 2, "Backup with command: $cmd";
   $ret = `($cmd) 2>&1`;