SvcBusThreadPoolTimer_init() fixed

SvcBusThreadPoolTimer_init() fixed.c

int SvcBusThreadPoolTimer_init( SvcBusThreadPoolTimer* _this, SvcBusThreadPool* pool, SvcBusThreadPool_callback callback, void* context, unsigned int millis )
{
  FILETIME FileDueTime;
  ULARGE_INTEGER ulDueTime;

  _this->timer = CreateThreadpoolTimer( &SvcBusThreadPoolTimer_TimerCallback, _this, &pool->pcbe );
  if( _this->timer == NULL )
  {
    return SVCBUS_THREADPOOL_ERROR;
  }
  _this->context = context;
  _this->thread_id = 0;
  _this->callback = callback;
  /* notice in the following line of code the negative sign in front of millis casted to __int64. It's to make the SetThreadpoolTimer() API to trigger
     the first timer relative to current datetime of the system. If using a positive value, it will be an absolute time in 100 nanosecond units since
     January 1, 1601 (UTC) forcing us to obtain the current datetime and do the arithmetics */
  ulDueTime.QuadPart = -(__int64)millis * 10 /* 100 nanosecond increments per microsecond */ * 1000 /* microseconds per millisecond */; 
  FileDueTime.dwHighDateTime = ulDueTime.HighPart;
  FileDueTime.dwLowDateTime = ulDueTime.LowPart;
  SetThreadpoolTimer( _this->timer, &FileDueTime, millis, 0 );

  return SVCBUS_THREADPOOL_OK;
}