From 80e534390888523bb096292b4973d1597abe7506 Mon Sep 17 00:00:00 2001
From: Hylke Bons <hylkebons@gmail.com>
Date: Sun, 5 Jun 2011 17:35:22 +0100
Subject: [PATCH] fetcher base: check if thread exists before disposing it

---
 SparkleLib/SparkleFetcherBase.cs | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/SparkleLib/SparkleFetcherBase.cs b/SparkleLib/SparkleFetcherBase.cs
index 9c5758b7..e348d972 100644
--- a/SparkleLib/SparkleFetcherBase.cs
+++ b/SparkleLib/SparkleFetcherBase.cs
@@ -40,6 +40,8 @@ namespace SparkleLib {
         protected string remote_url;
         private Thread thread;
 
+        public abstract bool Fetch ();
+
 
         public SparkleFetcherBase (string server, string remote_folder, string target_folder)
         {
@@ -102,14 +104,13 @@ namespace SparkleLib {
 
         public void Dispose ()
         {
-            this.thread.Abort ();
-            this.thread.Join ();
+            if (this.thread != null) {
+                this.thread.Abort ();
+                this.thread.Join ();
+            }
         }
 
 
-        public abstract bool Fetch ();
-
-
         private void DisableHostKeyCheckingForHost (string host)
         {
             string ssh_config_file_path = SparkleHelpers.CombineMore (