[Bug fortran/94769] Possible use of uninitialized variable num

[sch...@linux-m68k.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94769

--- Comment #2 from Andreas Schwab <sch...@linux-m68k.org> ---
compare_to_allowed_values doesn't set *num most of the time even when returning
non-zero, especially if warn is true.