Hi!

As reported in PR77434 and PR77421 there should be a warning for
suspicious uses of conditional expressions with non-boolean arguments.

This warning triggers on conditional expressions in boolean context,
when both possible results are non-zero integer constants, so that
the resulting truth value does in fact not depend on the condition
itself.  Thus something like "if (a == b ? 1 : 2)" is always bogus,
and was most likely meant to be "if (a == (b ? 1 : 2))".


Boot-strap and reg-testing on x86_64-pc-linux-gnu without regressions.
Is it OK for trunk.


Thanks
Bernd.