[Bug c/61081] excessive warnings: right-hand operand of comma expression has no effect

[peter_e at gmx dot net]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=61081

--- Comment #2 from Peter Eisentraut <peter_e at gmx dot net> ---
No, these "functions" need to have a usable return value, because someone could
write

if (!sigemptyset(...))
    weirderror();