don't keep pointers to requests done that have been deleted

svn path=/trunk/playground/graphics/okular/; revision=606532

generators/ghostview/generator_ghostview.cpp

@@ -234,6 +234,7 @@ void GSGenerator::slotPixmapGenerated(const QImage* img)
     syncLock.unlock();
     m_sRequest->page()->setPixmap( m_sRequest->id(), new QPixmap( QPixmap::fromImage( *img ) ) );
     signalRequestDone( m_sRequest );
+    m_asRequest=0;
 }
 
 void GSGenerator::slotAsyncPixmapGenerated(QPixmap * pix)
@@ -241,6 +242,7 @@ void GSGenerator::slotAsyncPixmapGenerated(QPixmap * pix)
     kWarning() << "SlotASyncGenerated!\n";
     m_asRequest->page()->setPixmap( m_asRequest->id(), pix );
     signalRequestDone( m_asRequest );
+    m_asRequest=0;
     docLock.unlock();
 }