Fix 39e90ec: Integers for scripts are 64bit, but saved as 32bit (#9415)

(cherry picked from commit ddafc0de05)

src/saveload/extended_ver_sl.cpp

@@ -157,6 +157,7 @@ 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_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
 };