[evolution] Fix a crash in pdf_drag_drop. Ref the objects while cloning format_html.

[Chenthill Palanisamy <pchen src gnome org>]

commit c01655aa3ffed339cf485d162b24fad88b116b30
Author: Chenthill Palanisamy <pchenthill novell com>
Date:   Thu Dec 15 12:44:44 2011 +0530

    Fix a crash in pdf_drag_drop. Ref the objects while cloning format_html.

 mail/em-format-html.c |    9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)
---
diff --git a/mail/em-format-html.c b/mail/em-format-html.c
index 55f7aa9..706de09 100644
--- a/mail/em-format-html.c
+++ b/mail/em-format-html.c
@@ -689,11 +689,12 @@ em_format_html_clone_sync (CamelFolder *folder,
 	struct _format_msg *m;
 
 	m = mail_msg_new (&efh_format_info);
-	m->format = efh;
-	m->format_source = source;
-	m->folder = folder;
+	m->format = g_object_ref (efh);
+	if (source)
+		m->format_source = g_object_ref (source);
+	m->folder = g_object_ref (folder);
 	m->uid = g_strdup (uid);
-	m->message = msg;
+	m->message = g_object_ref (msg);
 
 	efh_format_helper (m, FALSE);
 	efh_format_free (m);