If we were supposed to set ERANGE, do so again, in case do_close() or
_nss_ldap_leave() overwrote errno with some other value.  Upstream #421.

diff -up nss_ldap-265/ldap-nss.ce nss_ldap-265/ldap-nss.c
--- nss_ldap-265/ldap-nss.ce	2010-07-08 16:17:07.000000000 -0400
+++ nss_ldap-265/ldap-nss.c	2010-07-08 16:17:03.000000000 -0400
@@ -3572,6 +3572,10 @@ _nss_ldap_getbyname (ldap_args_t * args,
 
   debug ("<== _nss_ldap_getbyname");
 
+  /* at least for the cases where we know we have to return ERANGE */
+  if (stat == NSS_TRYAGAIN)
+    do_map_errno(stat, errnop);
+
   return stat;
 }