From 62258abbf22b285c5cfa07f620441780d10c6b75 Mon Sep 17 00:00:00 2001
From: Georgy Litvinov <litvinovg@ya.ru>
Date: Mon, 17 Oct 2016 17:33:55 +0300
Subject: [PATCH] additional check

---
 source/java/writer2latex/xhtml/GreenstoneTags.java | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/source/java/writer2latex/xhtml/GreenstoneTags.java b/source/java/writer2latex/xhtml/GreenstoneTags.java
index 7c4b665..0b761af 100644
--- a/source/java/writer2latex/xhtml/GreenstoneTags.java
+++ b/source/java/writer2latex/xhtml/GreenstoneTags.java
@@ -102,6 +102,9 @@ public class GreenstoneTags {
 	}
 	
 	private static Node openPageDiv(Node hnode,int pageNum){
+		if (hnode == null){
+			return hnode;
+		}
 		Document doc = hnode.getOwnerDocument();
 		Element openBlock = (Element) doc.createElement("div");
 		openBlock.setAttribute("class", "pageNum");