Make sure an old_velocity is always passed

Fixes crash on placing a new subway wagon
2017-12-06 21:27:04 +01:00 · 2017-12-06 21:27:04 +01:00 · e9c51dfab4
parent dc67ff7226
commit e9c51dfab4
1 changed files with 1 additions and 1 deletions
--- a/advtrains/wagons.lua
+++ b/advtrains/wagons.lua
@ -519,7 +519,7 @@ function wagon:on_step(dtime)
 				self:update_animation(gp.velocity, self.old_velocity)
 			end
 			if self.custom_on_velocity_change then
-				self:custom_on_velocity_change(gp.velocity, self.old_velocity)
+				self:custom_on_velocity_change(gp.velocity, self.old_velocity or 0)
 			end
 		end