From 372a04a6cf4608cf14bc7045aed9499012a23f52 Mon Sep 17 00:00:00 2001
From: Arndt Brenschede <Arndt.Brenschede@web.de>
Date: Sat, 14 Nov 2020 10:10:08 +0100
Subject: [PATCH] fixed nullpointer in Rd5DiffTool

---
 .../src/main/java/btools/mapaccess/Rd5DiffTool.java             | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/brouter-mapaccess/src/main/java/btools/mapaccess/Rd5DiffTool.java b/brouter-mapaccess/src/main/java/btools/mapaccess/Rd5DiffTool.java
index 426e40a..ac2f1d9 100644
--- a/brouter-mapaccess/src/main/java/btools/mapaccess/Rd5DiffTool.java
+++ b/brouter-mapaccess/src/main/java/btools/mapaccess/Rd5DiffTool.java
@@ -347,7 +347,7 @@ final public class Rd5DiffTool implements ProgressListener
 
            byte[] ab1 = createMicroCache( posIdx1, tileIdx, dis1, false );
            MicroCache mc2 = mcIn.readMC();
-           int targetSize = getPosIdx( posIdx2, tileIdx ) - getPosIdx( posIdx2, tileIdx-1 );
+           int targetSize = posIdx2 == null ? 0 : getPosIdx( posIdx2, tileIdx ) - getPosIdx( posIdx2, tileIdx-1 );
 
 /*         int targetSizeCmp = getPosIdx( posIdxCmp, tileIdx ) - getPosIdx( posIdxCmp, tileIdx-1 );
            if ( targetSizeCmp != targetSize ) throw new IllegalArgumentException( "target size mismatch: "+ targetSize + "," + targetSizeCmp );