AW: [En-Nut-Discussion] DNS fix

[Oliver Schulz]

Hi Michel,

> I checked it and all other places where I set pointers to 0 prevent
> them from being freed twice.
> E.g. adding dor->dor_name = 0; and dor->dor_data = 0 to
> ReleaseDnsResource()
> DOES prevent freeing twice. (Right?)
Thats right.

But since the ReleaseDnsXXX functions are only called once at the very end
of NutDnsGetResource/NutDnsGetHostByName and the used structures (doh, doq
and dor) are not freed in any other way before, you can be sure, that they
are not freed twice...

Oliver.