K 10
svn:author
V 2
bz
K 8
svn:date
V 27
2008-09-07T13:09:04.255927Z
K 7
svn:log
V 474
Catch a possible NULL pointer deref in case the offsets got mangled
somehow.
As a consequence we may now get an unexpected result(*).
Catch that error cases with a well defined panic giving appropriate
pointers to ease debugging.

(*) While the concensus was that the case should never happen unless
    there was a bug, noone was definitively sure.

Discussed with:		kmacy (about 8 months back)
Reviewed by:		silby (as part of a larger patch in March)
MFC after:		2 months

END