make isConnected public static

git-svn-id: svn+ssh://svn.internal.sanger.ac.uk/repos/svn/pathsoft/artemis/trunk@5720 ee4ac58c-ac51-4696-9907-e4b3aa274f04

uk/ac/sanger/artemis/components/filetree/FileList.java

@@ -153,8 +153,10 @@ public class FileList
     return vdir.containsKey(d);
   }
 
-  protected boolean isConnected()
+  public static boolean isConnected()
   {
+    if(ssh_client == null)
+      return false;
     return ssh_client.isConnected();
   }
 }