Merge branch 'master' into jgrpp

# Conflicts:
#	src/elrail.cpp
#	src/ground_vehicle.hpp
#	src/landscape.cpp
#	src/saveload/afterload.cpp
#	src/saveload/saveload.h
#	src/tile_cmd.h
#	src/town_cmd.cpp
#	src/tunnelbridge_cmd.cpp

src/rail_cmd.cpp

@@ -3752,7 +3752,7 @@ void DrawTrainDepotSprite(int x, int y, int dir, RailType railtype)
 	DrawRailTileSeqInGUI(x, y, dts, offset, 0, palette);
 }
 
-static int GetSlopePixelZ_Track(TileIndex tile, uint x, uint y)
+static int GetSlopePixelZ_Track(TileIndex tile, uint x, uint y, bool ground_vehicle)
 {
 	if (IsPlainRail(tile)) {
 		int z;