From 3864eb2e35f5cbcc90272dbb8c836f2fedd2a3ae Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Joachim=20Sch=C3=B6berl?= <joachim.schoeberl@tuwien.ac.at>
Date: Tue, 4 Aug 2020 23:50:11 +0200
Subject: [PATCH] use MPI_DATAYPE_NULL  thx stefanozampini

---
 libsrc/meshing/meshtype.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libsrc/meshing/meshtype.cpp b/libsrc/meshing/meshtype.cpp
index cd8e2329..0730c9d8 100644
--- a/libsrc/meshing/meshtype.cpp
+++ b/libsrc/meshing/meshtype.cpp
@@ -22,7 +22,7 @@ namespace netgen
   { 
     static MPI_Datatype type = MPI_DATATYPE_NULL;
     static MPI_Datatype htype = MPI_DATATYPE_NULL;
-    if (!type)
+    if (type == MPI_DATATYPE_NULL)
       {
 	MeshPoint hp;
 	int blocklen[] = { 3, 1, 1 };