Explicitly set default facing direction to south

Both server[0] and client[1] code assume the default is 0 (`f`
is sent only if the client's facing value is other than 0), but
the liblcf default is actually 2 (down)[2].

Fixes an issue where a player facing north (0) would show up as
facing south (2) after logging out or switching to private mode.

[0]: https://github.com/ynoproject/ynoserver/blob/2db0c7f392665e06761ffeafa85ac7171e6160c0/server/room.go#L340
[1]: https://github.com/ynoproject/ynoengine/blob/ddec6fd42a10d3788600dcb0454f7581b2b3eb31/src/multiplayer/game_multiplayer.cpp#L561
[2]: https://github.com/EasyRPG/liblcf/blob/92c4450a1bc1acb58bd02bbb99b57e5036919cdf/src/generated/lcf/rpg/savemapeventbase.h#L37

Author: tsdko

src/game_playerother.h

@@ -12,8 +12,11 @@ using Game_PlayerBase = Game_CharacterDataStorage<lcf::rpg::SavePartyLocation>;
  */
 class Game_PlayerOther : public Game_PlayerBase {
 	public:
+		static constexpr int DEFAULT_FACING = Down;
+
 		Game_PlayerOther(int id) : Game_CharacterDataStorage(PlayerOther), id(id)
 		{
+			SetFacing(DEFAULT_FACING);
 			SetDirection(lcf::rpg::EventPage::Direction_down);
 			SetMoveSpeed(4);
 			SetAnimationType(lcf::rpg::EventPage::AnimType_non_continuous);

src/multiplayer/game_multiplayer.cpp

@@ -558,7 +558,7 @@ void Game_Multiplayer::SendBasicData() {
 	connection.SendPacketAsync<C::SpeedPacket>(player->GetMoveSpeed());
 	connection.SendPacketAsync<C::SpritePacket>(player->GetSpriteName(),
 				player->GetSpriteIndex());
-	if (player->GetFacing() > 0) {
+	if (player->GetFacing() != Game_PlayerOther::DEFAULT_FACING) {
 		connection.SendPacketAsync<C::FacingPacket>(player->GetFacing());
 	}
 	connection.SendPacketAsync<C::HiddenPacket>(player->IsSpriteHidden());