[gthumb] don't use the connection if it's null

[Paolo Bacchilega <paobac src gnome org>]

commit 137024f82d716ea62b0507c95f57786633285b27
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Fri Jul 16 21:24:12 2010 +0200

    don't use the connection if it's null

 extensions/picasaweb/dlg-import-from-picasaweb.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/extensions/picasaweb/dlg-import-from-picasaweb.c b/extensions/picasaweb/dlg-import-from-picasaweb.c
index b3cd364..48bdb59 100644
--- a/extensions/picasaweb/dlg-import-from-picasaweb.c
+++ b/extensions/picasaweb/dlg-import-from-picasaweb.c
@@ -750,7 +750,8 @@ list_photos_ready_cb (GObject      *source_object,
 	GList            *list;
 	GList            *scan;
 
-	gth_task_dialog (GTH_TASK (data->conn), TRUE, NULL);
+	if (data->conn != NULL)
+		gth_task_dialog (GTH_TASK (data->conn), TRUE, NULL);
 	_g_object_list_unref (data->photos);
 	data->photos = picasa_web_service_list_albums_finish (picasaweb, result, &error);
 	if (error != NULL) {