fix first user

oml/user/models.py

@@ -161,9 +161,13 @@ class User(db.Model):
             if not was_peering:
                 Changelog.record(state.user(), 'addpeer', self.id, self.nickname)
             if not 'index' in self.info:
-                self.info['index'] = max([
-                    u.info.get('index', -1) for u in User.query.filter_by(peered=True)
-                ]) + 1
+                qs = User.query.filter_by(peered=True)
+                if qs.count():
+                    self.info['index'] = max([
+                        u.info.get('index', -1) for u in qs
+                    ]) + 1
+                else:
+                    self.info['index'] = 1
             self.peered = True
             self.save()
             if self.id in state.removepeer: