Updated patch makes stackdepth() not consuming the C stack for recursion. The new code is not strictly equivalent to the old code, but I think they should produce the same results in common cases (the existing stack depth calculation algorithm is not free from bugs, see issue24340).

Since this change is not trivial, I think it should be made it only in master. In maintained versions it is safer to change build options on Windows to produce the executable with larger stack.