Fix copyvar with non-var argument

data/maps/SkyPillar_2F/scripts.inc

@@ -6,7 +6,11 @@ SkyPillar_2F_MapScripts::
 
 SkyPillar_2F_OnTransition:
 	call_if_lt VAR_SKY_PILLAR_STATE, 2, SkyPillar_2F_EventScript_CleanFloor
-	copyvar VAR_ICE_STEP_COUNT, 1
+#if UBFIX
+	setvar VAR_ICE_STEP_COUNT, 1
+#else
+	copyvar VAR_ICE_STEP_COUNT, 1, warn=FALSE
+#endif
 	end
 
 SkyPillar_2F_EventScript_CleanFloor::