From 20f79bc34d17177f3557eee401e77b38ec997500 Mon Sep 17 00:00:00 2001
From: Vladimir Byko-Ianko <v.bykoianko@corp.mail.ru>
Date: Wed, 24 Apr 2019 17:40:53 +0300
Subject: [PATCH] Minor fixes.

---
 routing/routing_session.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/routing/routing_session.cpp b/routing/routing_session.cpp
index b7206289f4..f6907a0cde 100644
--- a/routing/routing_session.cpp
+++ b/routing/routing_session.cpp
@@ -262,7 +262,9 @@ void RoutingSession::Reset()
 
 void RoutingSession::SetState(SessionState state)
 {
-  m_changeSessionStateCallback(m_state, state);
+  if (m_changeSessionStateCallback)
+    m_changeSessionStateCallback(m_state, state);
+
   m_state = state;
 }