fix crash by ending the paint operations when they're done

svn path=/branches/work/kde4/playground/graphics/okular/; revision=546187

generators/chm/generator_t.cpp

@@ -97,6 +97,7 @@ void TGenerator::slotCompleted()
         bool moreToPaint;
 //                 m_syncGen->view()->layout();
         m_syncGen->paint(&p, r,0,&moreToPaint);
+        p.end();
         additionalRequestData();
         syncLock.unlock();
         m_request->page->setPixmap( m_request->id, pix );