[Bug c++/57709] -Wshadow is too strict / has false positives

[jan.kratochvil at redhat dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57709

--- Comment #3 from Jan Kratochvil <jan.kratochvil at redhat dot com> ---
It may not be exactly correct but from a practical standpoint clang has caught
my bug while not annoying me with tons of needless changes like gcc did, FYI.