[Commits] [wesnoth/wesnoth] 713995: Reduce invisible units' transparency (#987)

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/wesnoth/wesnoth
  Commit: 713995276b5d08fa999da12c61f8df8296d79c36
      https://github.com/wesnoth/wesnoth/commit/713995276b5d08fa999da12c61f8df8296d79c36
  Author: Wedge009 <wedge009 at wedge009.net>
  Date:   2017-05-04 (Thu, 04 May 2017)

  Changed paths:
    M src/units/drawer.cpp

  Log Message:
  -----------
  Reduce invisible units' transparency (#987)

Units are rendered at 0.5 alpha when they are invisible (for example, Elvish Avengers' Ambush ability). An issue arises with the Shadow (and Nightgaunt) ghost unit which has the Nightstalker ability allowing it to be invisible at night time - in combination with its fluctuating alpha animation, it can be quite hard for the player to see at night time (https://gna.org/bugs/?14503). So this change slightly increases the alpha level of invisible units from 0.5 to 0.6.