[VTableInterpose] fix crash when reloading savegames with add-spatter enabled #8795

Job	Run time
check-pr	1s
lint / lint	30s
docs / Build linux64	1m 18s
package / Windows / Build win64	4m 56s
package / Linux / Build linux64	1m 24s
test / Windows MSVC / Build win64	4m 7s
test / Linux gcc-10 / Build linux64	1m 24s
test / Linux gcc-12 / Build linux64	1m 42s
test / Run Linux test suite / Test (ubuntu, gcc-10, default plugins, default config)	54s
test / Run Linux test suite (gcc-12, all plugins) / Test (ubuntu, gcc-12, all plugins, default config)	57s
test / Run Windows test suite (empty config) / Test (windows, msvc, default plugins, empty config)	49s
test / Run Windows test suite / Test (windows, msvc, default plugins, default config)	53s
	18m 55s

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