Codechange: Don't use a global for the terrforming error tile.

src/object_gui.cpp

@@ -26,6 +26,7 @@
 #include "zoom_func.h"
 #include "terraform_cmd.h"
 #include "object_cmd.h"
+#include "road_cmd.h"
 
 #include "widgets/object_widget.h"
 
@@ -543,7 +544,7 @@ public:
 	void OnPlaceObject(Point pt, TileIndex tile) override
 	{
 		ObjectClass *objclass = ObjectClass::Get(_selected_object_class);
-		Command<CMD_BUILD_OBJECT>::Post(STR_ERROR_CAN_T_BUILD_OBJECT, CcTerraform,
+		Command<CMD_BUILD_OBJECT>::Post(STR_ERROR_CAN_T_BUILD_OBJECT, CcPlaySound_CONSTRUCTION_OTHER,
 				tile, objclass->GetSpec(_selected_object_index)->Index(), _selected_object_view);
 	}