typo bugfix

views/primary.py

@@ -117,6 +117,6 @@ class StatGraph(EntityView):
                 self.w(u'<h2>%s</h2>' % label)
                 self.w(self._cw.view('plot', rset, 'null'))
                 plot_displayed = True
-        if not plot_display:
+        if not plot_displayed:
             self.w(u'<h2>%s<h2>' % _('No stats yet'))
         self.w(u'</div>')