protection in case quickview fails to load

svn: r19708

src/plugins/gramplet/QuickViewGramplet.py

@@ -88,6 +88,7 @@ class QuickViewGramplet(Gramplet):
                                               quick_view,
                                               active_handle,
                                               container=self.gui.textview)
+            if docman:
                 self.set_has_data(docman.document.has_data)
         else:
             self.clear_text()