Ensure that cms page always has a non empty html page title.

src/service/response/cms_response.e

@@ -1262,7 +1262,11 @@ feature -- Generation
 			if attached user as l_user then
 				page.register_variable (l_user.name, "user")
 			end
-			page.register_variable (title, "site_title")
+			if attached title as l_title then
+				page.register_variable (l_title, "site_title")
+			else
+				page.register_variable (site_name, "site_title")
+			end
 			page.set_is_front (is_front)
 			page.set_is_https (request.is_https)
 

src/theme/smarty_theme/smarty_cms_page_template.e

@@ -48,7 +48,11 @@ feature -- Access
 				variables.force (html_encoded (l_title), "head_title")
 				variables.force (html_encoded (l_title), "page_title")
 			else
-				variables.force ("CMS", "head_title")
+				if attached variables.item ("site_title") as l_site_title then
+					variables.force (l_site_title, "head_title")
+				else
+					variables.force ("CMS", "head_title")
+				end
 				variables.force ("", "page_title")
 			end
 
@@ -128,7 +132,7 @@ feature -- Registration
 		end
 
 note
-	copyright: "2011-2014, Jocelyn Fiat, Eiffel Software and others"
+	copyright: "2011-2016, Jocelyn Fiat, Javier Velilla, Eiffel Software and others"
 	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
 	source: "[
 			Eiffel Software