File CVE-2018-20097.patch of Package exiv2.30966

From 9296067b95b39bc055112b91d2f4031b7b542aec Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Luis=20D=C3=ADaz=20M=C3=A1s?= <piponazo@gmail.com>
Date: Tue, 12 Feb 2019 22:30:58 +0100
Subject: [PATCH] Fix access to null pointer in TiffParser

---
 src/tiffimage_int.cpp | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

Index: exiv2-0.26/src/tiffimage.cpp
===================================================================
--- exiv2-0.26.orig/src/tiffimage.cpp
+++ exiv2-0.26/src/tiffimage.cpp
@@ -2040,10 +2040,8 @@ namespace Exiv2 {
             TiffFinder finder(0x00fe, imageGroups[i]);
             pSourceDir->accept(finder);
             TiffEntryBase* te = dynamic_cast<TiffEntryBase*>(finder.result());
-            if (   te
-                && te->pValue()->typeId() == unsignedLong
-                && te->pValue()->count() == 1
-                && (te->pValue()->toLong() & 1) == 0) {
+            const Value* pV = te != NULL ? te->pValue() : NULL;
+            if (pV && pV->typeId() == unsignedLong && pV->count() == 1 && (pV->toLong() & 1) == 0) {
                 primaryGroups.push_back(te->group());
             }
         }