Fix PR 108980: note without warning due to array bounds check
The problem here is after r13-4748-g2a27ae32fabf85, in some
cases we were calling inform without a corresponding warning.
This changes the logic such that we only cause that to happen
if there was a warning happened before hand.
Changes since
* v1: Fix formating and dump message as suggested by Jakub.
OK? Bootstrapped and tested on x86_64-linux-gnu with no regressions.
gcc/ChangeLog:
PR tree-optimization/108980
* gimple-array-bounds.cc (array_bounds_checker::check_array_ref):
Reorgnize the call to warning for not strict flexible arrays
to be before the check of warned.