From d109948f0dd4190d7aca1e0fa7e2706ef3f40a6c Mon Sep 17 00:00:00 2001
From: Michael Stahl <mstahl@redhat.com>
Date: Tue, 27 Jun 2017 17:32:16 +0200
Subject: tdf#108814 sfx2: fix crash in sidebar when XUpdateModel not
 implemented

com.sun.star.ui.XUpdateModel was added in 5.1 so pre-existing extensions
don't implement it.

(regression from 0635208edf1cdee4235ea87666a473ac81007555)

Change-Id: I6749a9cf2fc82b9cd90d85a682247104e369e167
---
 sfx2/source/sidebar/ResourceManager.cxx | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/sfx2/source/sidebar/ResourceManager.cxx b/sfx2/source/sidebar/ResourceManager.cxx
index adbedece1695..140190228f01 100644
--- a/sfx2/source/sidebar/ResourceManager.cxx
+++ b/sfx2/source/sidebar/ResourceManager.cxx
@@ -719,7 +719,10 @@ void ResourceManager::UpdateModel(const css::uno::Reference<css::frame::XModel>&
         for (SharedPanelContainer::const_iterator it = rContainer.begin(); it != rContainer.end(); ++it)
         {
             css::uno::Reference<css::ui::XUpdateModel> xPanel((*it)->GetPanelComponent(), css::uno::UNO_QUERY);
-            xPanel->updateModel(xModel);
+            if (xPanel.is()) // tdf#108814 interface is optional
+            {
+                xPanel->updateModel(xModel);
+            }
         }
     }
 }
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