Fix scripted paradrops

A recent PR changed ParaDrop from an Effect to an Activity. Idle triggers in the mission scripts however have already queued activities for the paradropped units, so the ParaDrop activity would only run once the first activity had finished (which could never happen).

mods/ra/maps/allies-03a/allies03a.lua

@@ -16,7 +16,13 @@ else
 	ChangeStance = true
 end
 
-IdleHunt = function(actor) Trigger.OnIdle(actor, actor.Hunt) end
+IdleHunt = function(actor)
+	Trigger.OnIdle(actor, function(a)
+		if a.IsInWorld then
+			a.Hunt()
+		end
+	end)
+end
 
 ProduceUnits = function(factory, count)
 	if ussr.IsProducing("e1") then

mods/ra/maps/allies-03b/allies03b.lua

@@ -27,7 +27,13 @@ else
 	ChangeStance = true
 end
 
-IdleHunt = function(actor) Trigger.OnIdle(actor, actor.Hunt) end
+IdleHunt = function(actor)
+	Trigger.OnIdle(actor, function(a)
+		if a.IsInWorld then
+			a.Hunt()
+		end
+	end)
+end
 
 Tick = function()
 	if TeleportJeepCamera and Jeep.IsInWorld then

mods/ra/maps/desert-shellmap/desert-shellmap.lua

@@ -36,9 +36,17 @@ ParadropWaypoints = { Paradrop1, Paradrop2, Paradrop3, Paradrop4, Paradrop5, Par
 BindActorTriggers = function(a)
 	if a.HasProperty("Hunt") then
 		if a.Owner == allies then
-			Trigger.OnIdle(a, a.Hunt)
+			Trigger.OnIdle(a, function(a)
+				if a.IsInWorld then
+					a.Hunt()
+				end
+			end)
 		else
-			Trigger.OnIdle(a, function(a) a.AttackMove(AlliedTechnologyCenter.Location) end)
+			Trigger.OnIdle(a, function(a)
+				if a.IsInWorld then
+					a.AttackMove(AlliedTechnologyCenter.Location)
+				end
+			end)
 		end
 	end
 

mods/ra/maps/intervention/intervention.lua

@@ -60,7 +60,11 @@ ParadropSovietUnits = function()
 	local units = powerproxy.SendParatroopers(MCVDeployLocation.CenterPosition, false, 256 - 53)
 
 	Utils.Do(units, function(a)
-		Trigger.OnIdle(a, a.Hunt)
+		Trigger.OnIdle(a, function(actor)
+			if actor.IsInWorld then
+				actor.Hunt()
+			end
+		end)
 	end)
 
 	powerproxy.Destroy()

mods/ra/maps/survival01/survival01.lua

@@ -185,7 +185,11 @@ SendSovietParadrops = function(table)
 	local units = powerproxy.SendParatroopers(table[2].CenterPosition, false, table[1])
 
 	Utils.Do(units, function(unit)
-		Trigger.OnIdle(unit, unit.Hunt)
+		Trigger.OnIdle(unit, function(a)
+			if a.IsInWorld then
+				a.Hunt()
+			end
+		end)
 	end)
 end
 

mods/ra/maps/survival02/survival02.lua

@@ -35,7 +35,13 @@ ParaWaves =
 	{ AttackTicks * 3, { "SovietSquad", SovietParaDrop1 } }
 }
 
-IdleHunt = function(unit) Trigger.OnIdle(unit, unit.Hunt) end
+IdleHunt = function(unit)
+	Trigger.OnIdle(unit, function(a)
+		if a.IsInWorld then
+			a.Hunt()
+		end
+	end)
+end
 
 GuardHarvester = function(unit, harvester)
 	if not unit.IsDead then