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. */

src/saveload/extended_ver_sl.cpp

@@ -159,6 +159,7 @@ const SlxiSubChunkInfo _sl_xv_sub_chunk_infos[] = {
 	{ XSLFI_DEPOT_ORDER_EXTRA_FLAGS,XSCF_IGNORABLE_UNKNOWN,   1,   1, "depot_order_extra_flags",   nullptr, nullptr, nullptr        },
 	{ XSLFI_EXTRA_SIGNAL_TYPES,     XSCF_NULL,                1,   1, "extra_signal_types",        nullptr, nullptr, nullptr        },
 	{ XSLFI_BANKRUPTCY_EXTRA,       XSCF_NULL,                1,   1, "bankruptcy_extra",          nullptr, nullptr, nullptr        },
+	{ XSLFI_OBJECT_GROUND_TYPES,    XSCF_NULL,                1,   1, "object_ground_types",       nullptr, nullptr, nullptr        },
 	{ XSLFI_SCRIPT_INT64,           XSCF_NULL,                1,   1, "script_int64",              nullptr, nullptr, nullptr        },
 	{ XSLFI_NULL, XSCF_NULL, 0, 0, nullptr, nullptr, nullptr, nullptr },// This is the end marker
 };

src/saveload/extended_ver_sl.h

@@ -113,6 +113,8 @@ enum SlXvFeatureIndex {
 	XSLFI_DEPOT_ORDER_EXTRA_FLAGS,                ///< Depot order extra flags
 	XSLFI_EXTRA_SIGNAL_TYPES,                     ///< Extra signal types
 	XSLFI_BANKRUPTCY_EXTRA,                       ///< Extra company bankruptcy fields
+	XSLFI_OBJECT_GROUND_TYPES,                    ///< Object ground types
+
 	XSLFI_SCRIPT_INT64,                           ///< See: SLV_SCRIPT_INT64
 
 	XSLFI_RIFF_HEADER_60_BIT,                     ///< Size field in RIFF chunk header is 60 bit