[Bug c/99623] Code behaves differently at -O2 optimization

[sebastiano.vigna at unimi dot it]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99623

--- Comment #8 from Sebastiano Vigna <sebastiano.vigna at unimi dot it> ---
I'm sorry, I did the test on the wrong file. No, you cannot eliminate the &,
even if the type is correct, and h can be NULL at that point. I'll ask the
libavl maintainers their opinion. We can compile with that option but other
people might incur in the same problem.