Coverity errors in libndr/

[tridge at samba.org]

Luke,

 > Or put some assertion checks in?

time for my bi-yearly rant about assertions on NULL dereference :)

Unix and unix-like systems provide a highly efficient, zero code
assertion system. It interfaces to debuggers, it correctly propogates
to parent processes and it is even implemented in hardware on nearly
every system in existance. 

It's called the segmentation fault. It's wonderful. Use it :-)

Cheers, Tridge