[ardour-dev] latest CVS commit

[Paul Davis]

   * further touch-ups to the compute_peak() function
   * fix crash caused by clicking on pan automation track for a track
       with no outputs
   * automation event lists and curves now return the value of the
       first point, not the default value, when evaluating at times
       before the first existing point. this is closer to what the
       user probably expects.

  ardour/gtk: 0.581.3
  libardour:  0.881.1