tsearch(3C) problem

[pefv700 at perv.pe.utexas.edu]

I am trying to use the tsearch(3C) routines tsearch, tfind, and tdelete.  I
first call tsearch (Recall: char *tsearch((char *)key, (char **)rootp, compar))
with the following for "key" and "rootp"

(dbx) ex *saveitem
*saveitem = {
        ut_line = "ftp18903"
        ut_name = ""
        ut_host = ""
        ut_time = 670105915
(dbx) ex root
root = (nil)

	if ((matchitem = (struct utmp *)tsearch((char *)saveitem,
	(char **)&root, linecmp)) == (struct utmp *)NULL) {

The results of the call are that matchitem is the same as root:

(dbx) ex root
root = 0x4df0
(dbx) ex matchitem
matchitem = 0x4df0
(dbx) ex *root
*root = {
        ut_line = "wk "  
        ut_name = ""
        ut_host = ""
        ut_time = 0
}

A subsequent tfind with the same ut_line member as in *saveitem above (so that 
linecmp(saveitem, &wtbuf) returns 0)

	if ((matchitem = (struct utmp *)tfind((char *)&wtbuf,
	(char **)&root, linecmp)) != (struct utmp *)NULL) {

results in:

(dbx) ex matchitem
matchitem = 0x4df0
(dbx) ex *matchitem
*matchitem = {
        ut_line = "wk "
        ut_name = ""
        ut_host = ""
        ut_time = 8 
}

Well, it returned it as it was before (except for the 8) but it's obviously
not doing what I want it to do.  Any ideas?

Chris