am 38e53ada: am c59b2482: am 5a6f593b: Merge "Use sigemptyset to initialise sigset_t values. sigset_t may not be implemented as an integral type."

* commit '38e53adaddb474d41d1b6282eec38b71b8447d5d':
  Use sigemptyset to initialise sigset_t values. sigset_t may not be implemented as an integral type.