[poppler] poppler/Annot.cc

[Albert Astals Cid]

Rebased ref, commits from common ancestor:
commit d52bba350acb3023ebdba8537854206641cd0998
Author: Albert Astals Cid <aacid at kde.org>
Date:   Sat Jun 17 12:33:06 2017 +0200

    Fix crash in malformed file
    
    Bug #101429

diff --git a/poppler/Annot.cc b/poppler/Annot.cc
index 279f650d..974b098b 100644
--- a/poppler/Annot.cc
+++ b/poppler/Annot.cc
@@ -5401,7 +5401,7 @@ void AnnotScreen::initialize(PDFDoc *docA, Dict* dict) {
   action = NULL;
   if (dict->lookup("A", &obj1)->isDict()) {
     action = LinkAction::parseAction(&obj1, doc->getCatalog()->getBaseURI());
-    if (action->getKind() == actionRendition && page == 0) {
+    if (action && action->getKind() == actionRendition && page == 0) {
       error (errSyntaxError, -1, "Invalid Rendition action: associated screen annotation without P");
       delete action;
       action = NULL;