Currently only GetTextFaceA is tested, and in an ancillary way, and the
behavior differs from GetTextFaceW.

If the the socket is connected and lpFrom is not NULL, Linux will set
msg_namelen to zero and ignore msg_name in recvfrom so don't try try
to update lpFrom.

This allows applications to wait for state transitions to be really
complete. Fixes some xvid crashes.

Prevents a null pointer dereference.

Should fix Valgrind warnings 'Conditional jump or move depends on
uninitialised value(s)' in inetcomm tests.