When the loaded document is empty, consider its loading as failed.

(Added a TODO for a proper UI message.)
BUG: 179447

svn path=/trunk/KDE/kdegraphics/okular/; revision=904821

core/document.cpp

@@ -680,6 +680,10 @@ bool DocumentPrivate::openDocumentInternal( const KService::Ptr& offer, bool iss
         m_pagesVector.clear();
         delete m_tempFile;
         m_tempFile = 0;
+
+        // TODO: emit a message telling the document is empty
+
+        openOk = false;
     }
 
     return openOk;