Log Message:
Update to 2.18.5:

Overview of Changes from GTK+ 2.18.4 to 2.18.5
==============================================

* Bugs fixed:
 603652	Sporadic crashes with GtkSocket
 598476	gnome-screensaver crashes when entering password...
 601473 GDK_BUTTON?_MOTION_MASK appears to be broken
 597386 Cannot click buttons more than once without...
 603619 the colormap of offscreen's pixmap doesn't...
 603904 gdk_draw_line doesn't have expose area.