Fix vendored STP/ABC build error with GCC 15 (closes #786) #787
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GCC is now more strict with function pointers, therefore the old trick to pass `(int (*)(const any_type*, const any_type*))` as `(int (*)())` without a cast does not work anymore.
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GCC is now more strict with function pointers, therefore the old trick to pass
(int (*)(const any_type*, const any_type*))as(int (*)())without a cast does not work anymore.It seems like casting
(int (*)())to(int (*)(const void*, const void*))insideVec_PtrSortdoes not make sense at all anymore, however I tried to make minimal changes since this is vendored code.