NAME
    RemHead -- remove the head node from a list

SYNOPSIS
    node = RemHead(list)
    D0             A0

    struct node *remhead(struct list *);

FUNCTION
    Get a pointer to the head node and remove it from the list.
    Assembly programmers may prefer to use the REMHEAD macro from
    "exec/lists.i".

WARNING
    This function does not arbitrate for access to the list.  The
    calling task must be the owner of the involved list.

INPUTS
    list - a pointer to the target list header

RESULT
    node - the node removed or zero when empty list

SEE ALSO
    addhead, addtail, enqueue, insert, remove, remtail