$NetBSD$

Workaround mikutter redmine bug #270:
autoscroll is incorrectly invoked when TL is scrolled down from the top

--- core/mui/cairo_timeline.rb.orig	2011-07-31 07:42:55.000000000 +0000
+++ core/mui/cairo_timeline.rb
@@ -91,6 +91,7 @@
       when Gdk::EventScroll::UP
         this.vadjustment.value -= this.vadjustment.step_increment
       when Gdk::EventScroll::DOWN
+        @scroll_to_zero_lator = false if this.vadjustment.value == 0
         this.vadjustment.value += this.vadjustment.step_increment end
       false }
     @tl.ssc(:expose_event){