Remove the complex typecast used to convert a HP-UX pthread struct to os_thread_id_t; the typecast seemed to work wrong in gcc-3.1 on HP-UX-10.20


innobase/os/os0thread.c:
  Remove the complex typecast used to convert a HP-UX pthread struct to os_thread_id_t; the typecast seemed to work wrong in gcc-3.1 on HP-UX-10.20