(svn r24075) [1.2] -Backport from trunk:

- Fix: Reversing trains while they were entering or leaving a depot could lead to stuck trains [FS#5093] (r24071)
- Fix: The 'last joined' server was not properly selected anymore [FS#5098] (r24070)
- Fix: Immediately start querying the last joined server instead of waiting for the requery loop [FS#5097] (r24069, r24062)
- Fix: Make the full snowedness level of houses the same as roads and rails [FS#5121] (r24064)

src/network/network_gamelist.cpp

@@ -62,7 +62,7 @@ static void NetworkGameListHandleDelayedInsert()
 			}
 			item->manually |= ins_item->manually;
 			if (item->manually) NetworkRebuildHostList();
-			UpdateNetworkGameWindow(false);
+			UpdateNetworkGameWindow();
 		}
 		free(ins_item);
 	}
@@ -105,7 +105,7 @@ NetworkGameList *NetworkGameListAddItem(NetworkAddress address)
 	}
 	DEBUG(net, 4, "[gamelist] added server to list");
 
-	UpdateNetworkGameWindow(false);
+	UpdateNetworkGameWindow();
 
 	return item;
 }
@@ -132,7 +132,7 @@ void NetworkGameListRemoveItem(NetworkGameList *remove)
 
 			DEBUG(net, 4, "[gamelist] removed server from list");
 			NetworkRebuildHostList();
-			UpdateNetworkGameWindow(false);
+			UpdateNetworkGameWindow();
 			return;
 		}
 		prev_item = item;

src/network/network_gui.cpp

@@ -72,9 +72,9 @@ void SortNetworkLanguages()
  * found on the network.
  * @param unselect unselect the currently selected item
  */
-void UpdateNetworkGameWindow(bool unselect)
+void UpdateNetworkGameWindow()
 {
-	InvalidateWindowData(WC_NETWORK_WINDOW, WN_NETWORK_WINDOW_GAME, unselect ? 1 : 0);
+	InvalidateWindowData(WC_NETWORK_WINDOW, WN_NETWORK_WINDOW_GAME, 0);
 }
 
 typedef GUIList<NetworkGameList*> GUIGameServerList;
@@ -438,6 +438,9 @@ protected:
 public:
 	NetworkGameWindow(const WindowDesc *desc) : QueryStringBaseWindow(NETWORK_CLIENT_NAME_LENGTH)
 	{
+		this->list_pos = SLP_INVALID;
+		this->server = NULL;
+
 		this->CreateNestedTree(desc);
 		this->vscroll = this->GetScrollbar(WID_NG_SCROLLBAR);
 		this->FinishInitNested(desc, WN_NETWORK_WINDOW_GAME);
@@ -447,11 +450,10 @@ public:
 		InitializeTextBuffer(&this->text, this->edit_str_buf, this->edit_str_size, 120);
 		this->SetFocusedWidget(WID_NG_CLIENT);
 
-		UpdateNetworkGameWindow(true);
-
 		this->field = WID_NG_CLIENT;
 		this->last_joined = NetworkGameListAddItem(NetworkAddress(_settings_client.network.last_host, _settings_client.network.last_port));
 		this->server = this->last_joined;
+		if (this->last_joined != NULL) NetworkUDPQueryServer(this->last_joined->address);
 
 		this->servers.SetListing(this->last_sorting);
 		this->servers.SetSortFuncs(this->sorter_funcs);
@@ -790,10 +792,6 @@ public:
 	 */
 	virtual void OnInvalidateData(int data = 0, bool gui_scope = true)
 	{
-		if (data == 1) {
-			this->server = NULL;
-			this->list_pos = SLP_INVALID;
-		}
 		this->servers.ForceRebuild();
 		this->SetDirty();
 	}

src/network/network_internal.h

@@ -145,7 +145,7 @@ void NetworkTCPQueryServer(NetworkAddress address);
 void GetBindAddresses(NetworkAddressList *addresses, uint16 port);
 void NetworkAddServer(const char *b);
 void NetworkRebuildHostList();
-void UpdateNetworkGameWindow(bool unselect);
+void UpdateNetworkGameWindow();
 
 bool IsNetworkCompatibleVersion(const char *version);
 

src/network/network_udp.cpp

@@ -395,7 +395,7 @@ void ClientNetworkUDPSocketHandler::Receive_SERVER_RESPONSE(Packet *p, NetworkAd
 
 	item->online = true;
 
-	UpdateNetworkGameWindow(false);
+	UpdateNetworkGameWindow();
 }
 
 void ClientNetworkUDPSocketHandler::Receive_MASTER_RESPONSE_LIST(Packet *p, NetworkAddress *client_addr)

src/pbs.cpp

@@ -369,7 +369,8 @@ Train *GetTrainForReservation(TileIndex tile, Track track)
  */
 bool IsSafeWaitingPosition(const Train *v, TileIndex tile, Trackdir trackdir, bool include_line_end, bool forbid_90deg)
 {
-	if (IsRailDepotTile(tile)) return true;
+	/* A depot is safe if we enter it, but not when we exit. */
+	if (IsRailDepotTile(tile) && TrackdirToExitdir(trackdir) != GetRailDepotDirection(tile)) return true;
 
 	if (IsTileType(tile, MP_RAILWAY)) {
 		/* For non-pbs signals, stop on the signal tile. */

src/town_cmd.cpp

@@ -2171,8 +2171,8 @@ static bool BuildTownHouse(Town *t, TileIndex tile)
 	/* no house allowed at all, bail out */
 	if (!CanBuildHouseHere(tile, t->index, false)) return false;
 
-	int z;
-	Slope slope = GetTileSlope(tile, &z);
+	Slope slope = GetTileSlope(tile);
+	int maxz = GetTileMaxZ(tile);
 
 	/* Get the town zone type of the current tile, as well as the climate.
 	 * This will allow to easily compare with the specs of the new house to build */
@@ -2180,7 +2180,7 @@ static bool BuildTownHouse(Town *t, TileIndex tile)
 
 	/* Above snow? */
 	int land = _settings_game.game_creation.landscape;
-	if (land == LT_ARCTIC && z >= HighestSnowLine()) land = -1;
+	if (land == LT_ARCTIC && maxz > HighestSnowLine()) land = -1;
 
 	uint bitmask = (1 << rad) + (1 << (land + 12));
 
@@ -2215,7 +2215,6 @@ static bool BuildTownHouse(Town *t, TileIndex tile)
 		houses[num++] = (HouseID)i;
 	}
 
-	int maxz = GetTileMaxZ(tile);
 	TileIndex baseTile = tile;
 
 	while (probability_max > 0) {

src/train_cmd.cpp

@@ -2200,6 +2200,8 @@ void FreeTrainTrackReservation(const Train *v, TileIndex origin, Trackdir orig_t
 	bool      free_tile = tile != v->tile || !(IsRailStationTile(v->tile) || IsTileType(v->tile, MP_TUNNELBRIDGE));
 	StationID station_id = IsRailStationTile(v->tile) ? GetStationIndex(v->tile) : INVALID_STATION;
 
+	/* A train inside a depot can't have a reservation. */
+	if (v->track == TRACK_BIT_DEPOT) return;
 	/* Don't free reservation if it's not ours. */
 	if (TracksOverlap(GetReservedTrackbits(tile) | TrackToTrackBits(TrackdirToTrack(td)))) return;