[Bug c/80528] reimplement gnulib's "useless-if-before-free" script as a compiler warning

[egallager at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80528

Eric Gallager <egallager at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
cc-ing Jim Meyering, the author of the original gnulib script, to see if he has
any input