Bump savegame for object ground types

src/saveload/afterload.cpp

@@ -68,6 +68,7 @@
 #include "../company_func.h"
 #include "../infrastructure_func.h"
 #include "../event_logs.h"
+#include "../newgrf_object.h"
 
 
 #include "saveload_internal.h"
@@ -3979,6 +3980,17 @@ bool AfterLoadGame()
 		}
 	}
 
+	if (SlXvIsFeatureMissing(XSLFI_OBJECT_GROUND_TYPES)) {
+		for (TileIndex t = 0; t < map_size; t++) {
+			if (IsTileType(t, MP_OBJECT)) {
+				_m[t].m4 = 0;
+				ObjectType type = GetObjectType(t);
+				extern void SetShouldObjectHaveNoFoundation(TileIndex tile, Slope tileh, ObjectType type, const ObjectSpec *spec);
+				SetShouldObjectHaveNoFoundation(t, SLOPE_ELEVATED, type, ObjectSpec::Get(type));
+			}
+		}
+	}
+
 	InitializeRoadGUI();
 
 	/* This needs to be done after conversion. */