In HP-UX-10.20, but not in HP-UX-11.0, the return value of pthread_mutex_trylock is inverted


configure.in:
  In HP-UX-10.20, but not in HP-UX-11.0, the return value of pthread_mutex_trylock is inverted
include/my_pthread.h:
  In HP-UX-10.20, but not in HP-UX-11.0, the return value of pthread_mutex_trylock is inverted