CAVEEXPRESS: fixed npc count for taxi04 map

see issue #117

it's hard to finish the map with the rising water for 3 npcs

Author: mgerhardy

base/caveexpress/maps/taxi-04.lua

@@ -161,7 +161,7 @@ function initMap()
 	map:setSetting("flyingnpc", "true")
 	map:setSetting("gravity", "9.81")
 	map:setSetting("npcs", "3")
-	map:setSetting("npctransfercount", "3")
+	map:setSetting("npctransfercount", "2")
 	map:setSetting("packages", "0")
 	map:setSetting("packagetransfercount", "0")
 	map:setSetting("points", "100")