NAME
        WaitPkt -- Waits for a packet to arrive at your pr_MsgPort (V36)

   SYNOPSIS
        packet = WaitPkt()
        D0

        struct dospacket *waitpkt(void);

   FUNCTION
        Waits for a packet to arrive at your pr_MsgPort.  If anyone has
        installed a packet wait function in pr_PktWait, it will be called.
        The message will be automatically GetMsg()ed so that it is no longer
        on the port.  It assumes the message is a dos packet.  It is NOT
        guaranteed to clear the signal for the port.

   RESULT
        packet - the packet that arrived at the port (from ln_Name of message).

   SEE ALSO
        sendpkt(), dopkt(), abortpkt()