diff -u -r samba-3.6.6-orig/source3/winbindd/winbindd_rpc.c samba-3.6.6/source3/winbindd/winbindd_rpc.c
--- samba-3.6.6-orig/source3/winbindd/winbindd_rpc.c	2014-05-22 19:28:00.000000000 +0200
+++ samba-3.6.6/source3/winbindd/winbindd_rpc.c	2014-05-22 19:50:35.000000000 +0200
@@ -580,8 +580,6 @@
 					      &user_policy,
 					      &rid_array,
 					      &result);
-	num_groups = rid_array->count;
-
 	{
 		NTSTATUS _result;
 		dcerpc_samr_Close(b, mem_ctx, &user_policy, &_result);
@@ -590,10 +588,15 @@
 	if (!NT_STATUS_IS_OK(status)) {
 		return status;
 	}
-	if (!NT_STATUS_IS_OK(result) || num_groups == 0) {
+	if (!NT_STATUS_IS_OK(result)) {
+		return result;
+	}
+	num_groups = rid_array->count;
+	if (num_groups == 0) {
 		return result;
 	}
 
+
 	user_grpsids = TALLOC_ARRAY(mem_ctx, struct dom_sid, num_groups);
 	if (user_grpsids == NULL) {
 		status = NT_STATUS_NO_MEMORY;