Fix ldap_set_option( NULL, LDAP_OPT_PROTOCOL_VERSION, &v ) as

suggested by Steve Sonntag.

libraries/libldap/options.c

@@ -444,7 +444,7 @@ ldap_set_option(
 				/* not supported */
 				break;
 			}
-			ld->ld_version = vers;
+			lo->ldo_version = vers;
 		} return LDAP_OPT_SUCCESS;