Guard for null pointer

src/gui/properties/propertieswidget.cpp

@@ -551,6 +551,9 @@ void PropertiesWidget::loadDynamicData()
 
 void PropertiesWidget::loadUrlSeeds()
 {
+    if (!m_torrent)
+        return;
+
     m_ui->listWebSeeds->clear();
     qDebug("Loading URL seeds");
     const QVector<QUrl> hcSeeds = m_torrent->urlSeeds();