Log Message:
Updated meld to 3.16.4.

2016-12-18 meld 3.16.4
======================

  Fixes:

   * Make error displaying more robust with non-ASCII locales (Vasily Galkin)
   * Handle themes with scrollbar steppers better (Kai Willadsen)
   * Fix a traceback when pane has no file (Claude Paroz)
   * Fix triggering "Delete Change" actions from menu (Kai Willadsen)
   * Handle style theme not existing (Patrick Griffis)
   * Fix unintentional glib requirement bump (Kai Willadsen)

  Translations:

   * Claude Paroz (fr)