Correct the player attachment position for the new player model

Requires the player_api mod to 'detect' the new model

functions.lua

@@ -18,7 +18,9 @@ function boost_cart:manage_attachment(player, obj)
 	default.player_attached[player_name] = status
 
 	if status then
-		player:set_attach(obj, "", {x=0, y=6, z=0}, {x=0, y=0, z=0})
+		-- player_api came after the new model. Check for it. 
+		local y_pos = player_api and -4.5 or 6
+		player:set_attach(obj, "", {x=0, y=y_pos, z=0}, {x=0, y=0, z=0})
 		player:set_eye_offset({x=0, y=-4, z=0},{x=0, y=-4, z=0})
 	else
 		player:set_detach()