[Bug analyzer/112965] Valgrind error on gcc.dg/analyzer/fd-dup-1.c

[dmalcolm at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112965

--- Comment #3 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
A workaround might be to pad pp's buffer with trailing zero bytes up to a
multiple of 16.