configure: bug in gethostbyaddr_r arguments test (ITS#366)

[mityak@iname.com]

Full_Name: Dmitry Kovalev
Version: devel
OS: SunOS 5.6
URL: 
Submission from: (NULL) (195.14.48.2)


build/openldap.m4 contained the following:

if test $ol_cv_func_gethostbyaddr_r_nargs7 = yes -a \
                $ol_cv_func_gethostbyaddr_r_nargs8 = no ; then

-                ol_cv_func_gethostbyname_r_nargs=7

which causes configure script errors later on platforms with 7 args,
because of uncorrected cut'n'paste. should be

+               ol_cv_func_gethostbyaddr_r_nargs=7