Set dirty selection tiles when bridge is too long to build.

src/bridge_gui.cpp

@@ -24,6 +24,7 @@
 #include "cmd_helper.h"
 #include "tunnelbridge_map.h"
 #include "road_gui.h"
+#include "tilehighlight_func.h"
 
 #include "widgets/bridge_widget.h"
 
@@ -429,6 +430,8 @@ void ShowBuildBridgeWindow(TileIndex start, TileIndex end, TransportType transpo
 		new BuildBridgeWindow(&_build_bridge_desc, start, end, type, bl);
 	} else {
 		delete bl;
+		SetSelectionTilesDirty();
+		_thd.Reset();
 		ShowErrorMessage(STR_ERROR_CAN_T_BUILD_BRIDGE_HERE, errmsg, WL_INFO, TileX(end) * TILE_SIZE, TileY(end) * TILE_SIZE);
 	}
 }