[accerciser/gnome-3-32] Fix following relations

[Samuel Thibault <sthibaul src gnome org>]

commit 9868822864f68174d76875a7851e94cb41b67ce7
Author: Samuel Thibault <samuel thibault ens-lyon org>
Date:   Fri May 17 15:19:34 2019 +0200

    Fix following relations
    
    (cherry picked from commit d82ee833e075955295797b6ef5030bf1f795ae2b)

 plugins/interface_view.py | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)
---
diff --git a/plugins/interface_view.py b/plugins/interface_view.py
index bad2a80..80b92f9 100644
--- a/plugins/interface_view.py
+++ b/plugins/interface_view.py
@@ -321,8 +321,6 @@ class _SectionAccessible(_InterfaceSection):
     self.relation_bg = style.get_background_color(gtk.StateFlags.NORMAL).to_string()
 
     selection = self.relations_view.get_selection()
-    selection.set_select_function(self._relationSelectFunc, None)
-
     show_button = ui_xml.get_object('button_relation_show')
     show_button.set_sensitive(self._isSelectedInView(selection))
     selection.connect('changed', self._onViewSelectionChanged, show_button)
@@ -406,7 +404,7 @@ class _SectionAccessible(_InterfaceSection):
     '''
     selection = relations_view.get_selection()
     model, iter = selection.get_selected()
-    if iter:
+    if iter and model[iter][2] >= 0:
       path = model.get_path(iter)
       relations = self.node.acc.getRelationSet()
       acc = relations[path[0]].getTarget(model[iter][2])