Clone targetPos in attackPlan

On a rejoined client the data isn't the same anymore. But it's equal.
Likely this is because the data isn't aquired at the same turn.

This could also be solved more generally by copying all data which is
pushed to the AI. Or by using the same serializer for AI as for the rest
of the simulation.

binaries/data/mods/public/simulation/ai/petra/attackPlan.js

@@ -1239,7 +1239,7 @@ AttackPlan.prototype.getPathToTarget = function(gameState, fixedRallyPoint = fal
 	const endPos = { "x": this.targetPos[0], "y": this.targetPos[1] };
 	const path = Engine.ComputePath(startPos, endPos, gameState.getPassabilityClassMask("large"));
 	this.path = [];
-	this.path.push(this.targetPos);
+	this.path.push(clone(this.targetPos));
 	for (const p in path)
 		this.path.push([path[p].x, path[p].y]);
 	this.path.push(this.rallyPoint);
@@ -2271,7 +2271,7 @@ AttackPlan.prototype.Serialize = function()
 		"isBlocked": this.isBlocked,
 		"targetPlayer": this.targetPlayer,
 		"target": this.target !== undefined ? this.target.id() : undefined,
-		"targetPos": this.targetPos,
+		"targetPos": clone(this.targetPos),
 		"uniqueTargetId": this.uniqueTargetId,
 		"path": this.path,
 		"unitCollUpdateArray": this.unitCollUpdateArray