(svn r16741) [0.7] -Backport from trunk:

- Fix: When loading a savegame Engine::grffile might be left NULL in certain cases (dynamic_engines enabled, articulated vehicle with only wagon-override action3s) (r16737)
- Fix: Show Close instead of Cancel when there is nothing to canel in the content downloading window [FS#2991] (r16732)
- Fix: [NoAI] AIDepotList contained wrong tiles for hangars when st->xy != st->airport_tile (r16731)
- Fix: The Join station window did not show all stations nearby in some cases (r16728)
- Fix: Invalidate subsidies with invalid source or destination when converting older savegames (r16710)
- Fix: The list of animated tiles could have duplicates (only for old savegames) and tiles that were not animated [FS#2994] (r16709)

src/landscape.cpp

@@ -22,6 +22,7 @@
 #include "effectvehicle_func.h"
 #include "landscape_type.h"
 #include "settings_type.h"
+#include "animated_tile_func.h"
 
 #include "table/sprites.h"
 
@@ -471,6 +472,9 @@ void DrawFoundation(TileInfo *ti, Foundation f)
 
 void DoClearSquare(TileIndex tile)
 {
+	/* If the tile can have animation and we clear it, delete it from the animated tile list. */
+	if (_tile_type_procs[GetTileType(tile)]->animate_tile_proc != NULL) DeleteAnimatedTile(tile);
+
 	MakeClear(tile, CLEAR_GRASS, _generating_world ? 3 : 0);
 	MarkTileDirtyByTile(tile);
 }