clients_icons. self contacts fix

clients_icons/clients_icons.py

@@ -223,8 +223,9 @@ class ClientsIconsPlugin(GajimPlugin):
             # higest contact changed
             if roster.model[iter_][self.renderer_num] is not None:
                 caps = contact.client_caps._node
-                self.set_icon(roster.model, iter_, self.renderer_num, caps)
-                return
+                if caps:
+                    self.set_icon(roster.model, iter_, self.renderer_num, caps)
+                    return
         caps = None
         tag = iq_obj.stanza.getTags('c')
         if tag: