[zenity] Bug #668935 - the channel was being freed twice.

[Arx Henrique Pereira da Cruz <arxcruz src gnome org>]

commit fd165dfe195375f66d5d97b97a2d3ab22c0bb633
Author: Arx Cruz <arxcruz gnome org>
Date:   Mon Jan 30 15:56:23 2012 -0200

    Bug #668935 - the channel was being freed twice.

 src/tree.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/tree.c b/src/tree.c
index 10d8946..ad4a6d1 100644
--- a/src/tree.c
+++ b/src/tree.c
@@ -645,7 +645,7 @@ zenity_tree_dialog_response (GtkWidget *widget, int response, gpointer data)
       zen_data->exit_code = zenity_util_return_exit_code (ZENITY_ESC);
       break;
   }
-  if (channel != NULL)
+  if (channel->is_readable == TRUE)
     g_io_channel_shutdown (channel, TRUE, NULL);
 
   gtk_main_quit ();