[Bug tree-optimization/84561] -Wstringop-truncation with -O2 depends on strncpy's size type

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84561

--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
The simple patch that fixed the warning was never approved.  Here's my last
attempt to get approval:
  https://gcc.gnu.org/ml/gcc-patches/2018-11/msg01415.html
It too stalled, much to my frustration.