ITS#6188 add stub for ldap_pvt_thread_pool_retract()

libraries/libldap_r/thr_stub.c

@@ -166,6 +166,14 @@ ldap_pvt_thread_pool_submit (
 	return(0);
 }
 
+int
+ldap_pvt_thread_pool_retract (
+	ldap_pvt_thread_pool_t *pool,
+	ldap_pvt_thread_start_t *start_routine, void *arg )
+{
+	return(0);
+}
+
 int
 ldap_pvt_thread_pool_maxthreads ( ldap_pvt_thread_pool_t *tpool, int max_threads )
 {