[empathy] Fix warning if theme don't have footer_html

[Xavier Claessens <xclaesse src gnome org>]

commit 24f46af7642e8e2d0b7fa737d0fbb64ff394b437
Author: Xavier Claessens <xclaesse gmail com>
Date:   Sun Jun 21 11:28:29 2009 +0200

    Fix warning if theme don't have footer_html

 libempathy-gtk/empathy-theme-adium.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/libempathy-gtk/empathy-theme-adium.c b/libempathy-gtk/empathy-theme-adium.c
index fb6ff0e..9e5ff73 100644
--- a/libempathy-gtk/empathy-theme-adium.c
+++ b/libempathy-gtk/empathy-theme-adium.c
@@ -202,7 +202,9 @@ theme_adium_load (EmpathyThemeAdium *theme)
 	g_string_append (string, ""); /* We don't want header */
 	g_string_append (string, strv[i++]);
 	/* FIXME: We should replace adium %macros% in footer */
-	g_string_append (string, footer_html);
+	if (footer_html) {
+		g_string_append (string, footer_html);
+	}
 	g_string_append (string, strv[i++]);
 	priv->template_html = g_string_free (string, FALSE);