r17123: Fix 32bit/64bit portability issues again.
NO NOT change the winbindd response or request structures
*unless* you test a 32bit wbinfo against a 64bit winbindd.
The structure sizes MUST be the same on 32bit and 64 bit
platforms.
The way to test is to build a 64bit version of Winbind as normal.
Then build a 32bit version using gcc -m32. Now install the 64bit and
32bit versions of libnss_winbindd.so and launch the 64bit winbindd.
Make sure that the responses from both 32bit and 64bit versions
of wbinfo match.
If you don't understand the previous paragraph you don't need to
be changing nsswitch/winbindd_nss.h