Read from the correct variable

Fixes crash on KDE bug 249586
diff --git a/poppler/Movie.cc b/poppler/Movie.cc
index 42bc788..3e764ac 100644
--- a/poppler/Movie.cc
+++ b/poppler/Movie.cc
@@ -6,6 +6,7 @@
 // Hugo Mercier <hmercier31[at]gmail.com> (c) 2008
 // Pino Toscano <pino@kde.org> (c) 2008
 // Carlos Garcia Campos <carlosgc@gnome.org> (c) 2010
+// Albert Astals Cid <aacid@kde.org> (c) 2010
 //
 // This program is free software; you can redistribute it and/or modify
 // it under the terms of the GNU General Public License as published by
@@ -229,7 +230,7 @@
     if (poster.isRef() || poster.isStream()) {
       showPoster = gTrue;
     } else if (poster.isBool()) {
-      showPoster = obj1.getBool();
+      showPoster = poster.getBool();
       poster.free();
     } else {
       poster.free();