Ignore-this: 9fe2247164d572901ed4a30b009353db

Solaris defines pthread_once_t as a struct containing an array. The
initializer PTHREAD_ONCE_INIT needs two levels of brackets it but only has
one. Original patch from Mike Jerris <mike@jerris.com>.

darcs-hash:20090519170030-db55f-218c80b78e9ef367b8f1d19f4543b53a1a602cec.gz