[evolution] Disconnect signal handler from 'candidate' on its free

[Milan Crha <mcrha src gnome org>]

commit 0ee1a173d52a671b2c3c0656fda74e6015cfd225
Author: Milan Crha <mcrha redhat com>
Date:   Wed Aug 22 19:33:53 2012 +0200

    Disconnect signal handler from 'candidate' on its free

 widgets/misc/e-source-config.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/widgets/misc/e-source-config.c b/widgets/misc/e-source-config.c
index 79d2e24..16c3c05 100644
--- a/widgets/misc/e-source-config.c
+++ b/widgets/misc/e-source-config.c
@@ -231,6 +231,10 @@ source_config_add_candidate (ESourceConfig *config,
 static void
 source_config_free_candidate (Candidate *candidate)
 {
+	g_signal_handlers_disconnect_matched (
+		candidate->scratch_source, G_SIGNAL_MATCH_FUNC,
+		0, 0, NULL, G_CALLBACK (e_source_config_check_complete), NULL);
+
 	g_object_unref (candidate->page);
 	g_object_unref (candidate->scratch_source);
 	g_object_unref (candidate->backend);