lib/vserver.in[init_vservers]: warn if vservers are enabled but no vserver is found

ChangeLog

@@ -32,6 +32,7 @@ version 0.9.3 -- unreleased
 	 . init_vservers: test in a stricter way the real vservers availability
 	 . init_vservers: canonicalize VROOTDIR (since duplicity et al.
 	   don't follow symlinks)
+	 . init_vservers: warn if vservers are enabled but no vserver is found
     known bugs:
         easydialog: 
          . formDisplay does not return exit status.

lib/vserver.in

@@ -64,7 +64,11 @@ init_vservers() {
             return
       fi
       found_vservers=`ls $VROOTDIR | grep -E -v "lost+found|ARCHIVES" | tr "\n" " "`
-      [ -n "$found_vservers" ] || return
+      if [ -z "$found_vservers" ]; then
+         `if [ "$arg" = nodialog ]; then echo warning; else echo "msgBox warning"; fi` \
+            "vservers enabled in $conffile, but no vserver was found in $VROOTDIR.";      
+            return
+      fi
       vservers_are_available=yes
    fi
 }