[evolution] Fix another runtime warning.

[Matthew Barnes <mbarnes src gnome org>]

commit 09b0180c00c494e40e449de9de17c5c12c8b3ccd
Author: Matthew Barnes <mbarnes redhat com>
Date:   Fri May 28 11:28:24 2010 -0400

    Fix another runtime warning.

 shell/e-shell-content.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/shell/e-shell-content.c b/shell/e-shell-content.c
index fba96d7..965fab8 100644
--- a/shell/e-shell-content.c
+++ b/shell/e-shell-content.c
@@ -254,13 +254,13 @@ shell_content_forall (GtkContainer *container,
                       gpointer callback_data)
 {
 	EShellContentPrivate *priv;
-	GtkWidget *parent;
+	GtkWidget *parent = NULL;
 
 	priv = E_SHELL_CONTENT_GET_PRIVATE (container);
-	parent = gtk_widget_get_parent (priv->searchbar);
+	if (priv->searchbar != NULL)
+		parent = gtk_widget_get_parent (priv->searchbar);
 
-	if (include_internals && priv->searchbar != NULL &&
-		container == GTK_CONTAINER (parent))
+	if (include_internals && parent == GTK_WIDGET (container))
 		callback (priv->searchbar, callback_data);
 
 	/* Chain up to parent's forall() method. */