From 21c794780d01855ecffa2cf40dc5d5e4d6352038 Mon Sep 17 00:00:00 2001
From: Björn Hagemeister
Date: Tue, 13 May 2014 16:46:28 +0200
Subject: Fix segmentation fault after looking all screens and there is one
 client disconnected.

---
 src/server/mainwindow/mainwindow.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/server/mainwindow/mainwindow.cpp')

diff --git a/src/server/mainwindow/mainwindow.cpp b/src/server/mainwindow/mainwindow.cpp
index 00e4eb0..47f9610 100644
--- a/src/server/mainwindow/mainwindow.cpp
+++ b/src/server/mainwindow/mainwindow.cpp
@@ -737,7 +737,7 @@ void MainWindow::onButtonLock(bool checked)
 		// Check if client is Tutor or the manager is also running on this machine.
 		bool isManagerMachine = false;
 		foreach (const QHostAddress &address, QNetworkInterface::allAddresses()) {
-			if (address != QHostAddress(QHostAddress::LocalHost) && c->ip() == address.toString())
+			if (address != QHostAddress(QHostAddress::LocalHost) && c != NULL && c->ip() == address.toString())
 						 isManagerMachine = true;
 		}
 
-- 
cgit v1.2.3-55-g7522