Important bug fixes

Fixed an issue that would not let invisible creatures such as the Stalker to become idle, hence never returning visible.
Fixed an issue with gamemasters not being able to see invisible creatures that were out of their screen.

src/monster.cpp

@@ -744,21 +744,20 @@ void Monster::setIdle(bool idle)
 
 void Monster::updateIdleStatus()
 {
-	bool idle = false;
+	bool idle = true;
 
 	if (!isSummon()) {
-		if (conditions.empty() && targetList.empty()) {
-			idle = true;
-		} else if (!conditions.empty()) {
-			bool hasAggressiveCondition = false;
+		if (!targetList.empty()) {
+			// visible target
+			idle = false;
+		} else {
 			for (Condition* condition : conditions) {
 				if (condition->getType() >= CONDITION_ENERGY && condition->getType() <= CONDITION_ENERGY) {
-					hasAggressiveCondition = true;
+					// monsters with aggressive conditions never become idle
+					idle = false;
 					break;
 				}
 			}
-
-			idle = !hasAggressiveCondition;
 		}
 	}
 

src/player.cpp

@@ -549,6 +549,7 @@ bool Player::canSeeCreature(const Creature* creature) const
 	if (!creature->getPlayer() && !canSeeInvisibility() && creature->isInvisible()) {
 		return false;
 	}
+
 	return true;
 }
 

src/protocolgame.cpp

@@ -1786,7 +1786,7 @@ void ProtocolGame::AddCreature(NetworkMessage& msg, const Creature* creature, bo
 	msg.addByte(std::ceil((static_cast<double>(creature->getHealth()) / std::max<int32_t>(creature->getMaxHealth(), 1)) * 100));
 	msg.addByte(creature->getDirection());
 
-	if (!creature->isInGhostMode() && !creature->isInvisible()) {
+	if (!creature->isInvisible() || !otherPlayer && player->canSeeInvisibility()) {
 		AddOutfit(msg, creature->getCurrentOutfit());
 	} else {
 		static Outfit_t outfit;