Confusing change number info in smoke status

Now I've fixed the Solaris smoke farm, I've noticed something confusing in 
the status output:

larry is up [SunOS larry 5.6 Generic_105181-35 sun4u sparc SUNW,Ultra-1]
   Perl 5.8.x smoke is running
     change number 22081 started on 07/01/2004 03:00:54 GMT
         Change number 21996 started on Wed Jan  7 03:04:51 2004.

The first change number is obtained by my script which uses 'p4 changes', 
the second one comes from Smoke, which uses either the contents of .patch or 
parses patchlevel.h.  Unfortunately the 3 things aren't the same.  For 
example, at the moment the 'p4 changes' number for maint-5.8 is 22081, the 
.patch number is 21996 and the local_patches value from patchlevel.h is 21995.

-- 
Alan Burlison
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