No longer builds with Trusty/ GTK+ 3.10

[Cris Dywan]

For instance

/«PKGBUILDDIR»/midori/midori-window.vala:142.25-142.61: error: The name `max_width_chars' does not exist in the context of `Gtk.Entry?'
                        (widget as Gtk.Entry).max_width_chars = 256;