Write SaveMapEventBase::processed

* Write this flag to be compatible with RPG_RT saves.
* Player - always 1
* Events - always 1
* Vehicle - 0 until we have visited the same map as a vehicle
  map events, and vehicles we have seen on the map.

src/game_character.h

@@ -451,6 +451,16 @@ class Game_Character {
 	 */
 	void SetFlying(bool val);
 
+	/**
+	 * @return whether the RPG_RT processed flag is set.
+	 */
+	bool IsProcessed() const;
+
+	/**
+	 * Set the RPG_RT processed flag
+	 */
+	void SetProcessed(bool val);
+
 	/**
 	 * Checks if the character is stopping.
 	 *
@@ -1089,4 +1099,12 @@ inline void Game_Character::SetTransparency(int value) {
 	data()->transparency = std::min(std::max(value, 0), 7);
 }
 
+inline bool Game_Character::IsProcessed() const {
+	return data()->processed;
+}
+
+inline void Game_Character::SetProcessed(bool val) {
+	data()->processed = val;
+}
+
 #endif

src/game_event.cpp

@@ -36,9 +36,10 @@ Game_Event::Game_Event(int map_id, const RPG::Event& event) :
 	Game_Character(new RPG::SaveMapEvent()),
 	_data_copy(this->data()),
 	event(event),
-	from_save(false) {
-
+	from_save(false)
+{
 	SetMapId(map_id);
+	SetProcessed(true); //<- RPG_RT compatibility
 	SetMoveSpeed(3);
 	MoveTo(event.x, event.y);
 	Refresh();
@@ -52,6 +53,7 @@ Game_Event::Game_Event(int map_id, const RPG::Event& event, const RPG::SaveMapEv
 {
 	// Savegames have 0 for the mapid for compatibility with RPG_RT.
 	SetMapId(map_id);
+	SetProcessed(true); //<- RPG_RT compatibility
 
 	this->event.ID = data()->ID;
 

src/game_player.cpp

@@ -39,6 +39,7 @@ Game_Player::Game_Player():
 	Game_Character(&Main_Data::game_data.party_location)
 {
 	SetDirection(RPG::EventPage::Direction_down);
+	SetProcessed(true); //<- RPG_RT compatibility
 	SetMoveSpeed(4);
 	SetAnimationType(RPG::EventPage::AnimType_non_continuous);
 }

src/game_vehicle.cpp

@@ -157,10 +157,12 @@ RPG::Music& Game_Vehicle::GetBGM() {
 }
 
 void Game_Vehicle::Refresh() {
-	if (IsInUse())
+	if (IsInUse()) {
 		SetMapId(Game_Map::GetMapId());
-	else if (IsInCurrentMap())
+	} else if (IsInCurrentMap()) {
+		SetProcessed(true); //<- RPG_RT compatibility
 		MoveTo(GetX(), GetY());
+	}
 
 	switch (type) {
 		case None: