[anjal] Fix a crasher.

[Srinivasa Ragavan <sragavan src gnome org>]

commit 5f4f731783a3328d096ba3f982e6c1dc9975edac
Author: Srinivasa Ragavan <sragavan novell com>
Date:   Fri Jul 24 00:21:26 2009 +0530

    Fix a crasher.

 src/em-format-mail-display.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/src/em-format-mail-display.c b/src/em-format-mail-display.c
index 1921cad..c974949 100644
--- a/src/em-format-mail-display.c
+++ b/src/em-format-mail-display.c
@@ -1549,6 +1549,9 @@ efhd_attachment_button(EMFormatMail *efh, GtkWidget *eb, EMFormatMailPObject *po
 	gpointer parent = NULL;
 	char *txt;
 	
+	if (!eb || !GTK_IS_WIDGET(eb))
+		return NULL;
+
 	/* FIXME: handle default shown case */
 	d(printf("adding attachment button/content\n"));
 
@@ -1566,7 +1569,7 @@ efhd_attachment_button(EMFormatMail *efh, GtkWidget *eb, EMFormatMailPObject *po
 	e_attachment_set_can_show (attachment, info->handle != NULL);
 
 	parent = gtk_widget_get_toplevel (GTK_WIDGET (eb));
-	parent = GTK_WIDGET_TOPLEVEL (parent) ? parent : NULL;
+	parent = (parent && GTK_WIDGET_TOPLEVEL (parent)) ? parent : NULL;
 
 	view = E_ATTACHMENT_VIEW (efhd->priv->attachment_view);
 	gtk_widget_show (efhd->priv->attachment_view);