--without-threads crash

["Kurt D. Zeilenga" <Kurt@OpenLDAP.org>]

Seems --without-threads is broke in HEAD...

#0  0x28297850 in kill () from /usr/lib/libc.so.4
#1  0x282d9a31 in abort () from /usr/lib/libc.so.4
#2  0x282b5051 in __assert () from /usr/lib/libc.so.4
#3  0x808893e in bdb_cache_find_entry_id (env=0x8152400, cache=0x8190724, 
    id=1, rw=0, locker=0, lock=0xbfb7e758) at cache.c:874
#4  0x808d093 in bdb_id2entry_rw (be=0x8191100, tid=0x0, id=1, e=0xbfb7e74c, 
    rw=0, locker=0, lock=0xbfb7e758) at id2entry.c:102
#5  0x808a29d in bdb_dn2entry_rw (be=0x8191100, tid=0x0, dn=0xbfbfe858, 
    e=0xbfb7e74c, matched=0xbfb7e750, flags=0, rw=0, locker=0, lock=0xbfb7e758)
    at dn2entry.c:57
#6  0x8083852 in bdb_search (be=0x8191100, conn=0x819b9f8, op=0x8191c00, 
    base=0xbfbfe850, nbase=0xbfbfe858, scope=2, deref=0, slimit=0, tlimit=0, 
    filter=0x8158b50, filterstr=0xbfbfe840, attrs=0x0, attrsonly=0)
    at search.c:110
#7  0x8052329 in do_search (conn=0x819b9f8, op=0x8191c00) at search.c:318
#8  0x8050bd0 in connection_operation (ctx=0x0, arg_v=0x8158b20)
    at connection.c:980
#9  0x8097ff7 in ldap_pvt_thread_pool_submit (pool=0x8143f24, 
    start_routine=0x8050a58 <connection_operation>, arg=0x8158b20)
    at thr_stub.c:159
#10 0x8051847 in connection_op_activate (conn=0x819b9f8, op=0x8191c00)
    at connection.c:1579
#11 0x8051528 in connection_input (conn=0x819b9f8) at connection.c:1450
---Type <return> to continue, or q <return> to quit---up
#12 0x8051149 in connection_read (s=11) at connection.c:1260
#13 0x804f045 in slapd_daemon_task (ptr=0x0) at daemon.c:1790
#14 0x8097f41 in ldap_pvt_thread_create (thread=0xbfbff408, detach=0, 
    start_routine=0x804de24 <slapd_daemon_task>, arg=0x0) at thr_stub.c:48
#15 0x804f23e in slapd_daemon () at daemon.c:1873
#16 0x804c440 in main (argc=8, argv=0xbfbff4a0) at main.c:544
#17 0x804bc21 in _start ()