Log Message:
Update ruby-gnome2 to 0.19.4.

== Ruby-GNOME2 0.19.4: 2011-04-17

NOTE: 0.19.x releases are development series.

This release has many bug fixes and some improvements. The
fixed bugs include a memory leak bug on GC. If your
application live long time, you should upgrade.

=== Changes

==== Ruby/GLib2

  * Bug fixes:
    * fixed type_register on Ruby 1.9.
      [Simon Arnaud, Kouhei Sutou]
    * fixed memory leak in GC.
      [Kouhei Sutou]

==== Ruby/GTK2

  * Bug fixes:
    * [#2865895] support GdkWindow's cursor property.
      NOTE: GTK+ 2.18.0 is unsupported version.
      [Guillaume Cottenceau, Mamoru Tasaka]
    * Gtk::MenuItem.new accepts nil as a label.
      [Kazuhiro NISHIYAMA, Kouhei Sutou]
    * fixed wrong conversion in Gtk::TreePath#<=>.
      [Takeuchi Yusuke, Kouhei Sutou]
    * fix Gtk::RecentInfo#application_info's double free bug.
      [Kouhei Sutou]
  * Improvements:
    * Gdk::Window#invalidate accepts nil as 'area'
      argument. It means 'invalidates whole window'.
      [Hiroyuki Ito]
    * Gtk::Clipbord#request_text sets UTF-8 encoding in Ruby
      1.9.
      [Rg Rg, Kouhei Sutou]
    * add Gtk::TreePath#==.
      [Takeuchi Yusuke, Kouhei Sutou]

==== Ruby/Pango

  * Improvements:
    * add Pango::Gravity.
      [Hiroyuki Ito, Kouhei Sutou]

==== Ruby/GdkPixbuf

  * add Gdk::Pixbuf#pixels=.
    [Michal Suchanek]

==== Ruby/GStreamer

  * Bug fixes:
    * [#2920997] fix argument type. [Johan Kiviniemi]
  * [#2924886] implement Gst::MessageTag#parse. [Vincent Carmona]

==== Ruby/GtkMozEmbed

  * Bug Fixes:
    * [#2924766] fix -Wl,-rpath syntax. [OBATA Akio]
    * [#2925285] Gtk::MozEmbed#chrome_mask fails.
      [tobi, Kouhei Sutou]
    * support XULRunner 1.9.2. [OBATA Akio]

=== Thanks

  * Guillaume Cottenceau
  * Mamoru Tasaka
  * Michal Suchanek
  * Simon Arnaud
  * Kazuhiro NISHIYAMA
  * Johan Kiviniemi
  * OBATA Akio
  * Hiroyuki Ito
  * Rg Rg
  * Vincent Carmona
  * tobi
  * Takeuchi Yusuke
  * ...