(svn r16709) -Fix [FS#2994]: the list of animated tiles could have duplicates (only for old savegames) and tiles that weren't animated

src/saveload/afterload.cpp

@@ -30,6 +30,7 @@
 #include "../ai/ai.hpp"
 #include "../town.h"
 #include "../economy_base.h"
+#include "../animated_tile_func.h"
 
 #include "table/strings.h"
 
@@ -1890,6 +1891,30 @@ bool AfterLoadGame()
 		}
 	}
 
+	if (CheckSavegameVersion(122)) {
+		/* Animated tiles would sometimes not be actually animated or
+		 * in case of old savegames duplicate. */
+
+		extern TileIndex *_animated_tile_list;
+		extern uint _animated_tile_count;
+
+		for (uint i = 0; i < _animated_tile_count; /* Nothing */) {
+			/* Remove if tile is not animated */
+			bool remove = _tile_type_procs[GetTileType(_animated_tile_list[i])]->animate_tile_proc == NULL;
+
+			/* and remove if duplicate */
+			for (uint j = 0; !remove && j < i; j++) {
+				remove = _animated_tile_list[i] == _animated_tile_list[j];
+			}
+
+			if (remove) {
+				DeleteAnimatedTile(_animated_tile_list[i]);
+			} else {
+				i++;
+			}
+		}
+	}
+
 	AfterLoadLabelMaps();
 
 	GamelogPrintDebug(1);