From f34620b40b94d8021637c86ceb651ec881515397 Mon Sep 17 00:00:00 2001
From: Kohei Yoshida <kohei.yoshida@gmail.com>
Date: Fri, 3 May 2013 18:05:25 -0400
Subject: I should first check whether a broadcaster exists at this position.

Change-Id: I014e2054dda4103bb90b84db3bf20c5efd5dabab
---
 sc/source/core/data/column2.cxx | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/sc/source/core/data/column2.cxx b/sc/source/core/data/column2.cxx
index 3301e00928c2..db9a3e84e301 100644
--- a/sc/source/core/data/column2.cxx
+++ b/sc/source/core/data/column2.cxx
@@ -1874,8 +1874,12 @@ void ScColumn::FindUsed( SCROW nStartRow, SCROW nEndRow, bool* pUsed ) const
 
 void ScColumn::StartListening( SvtListener& rLst, SCROW nRow )
 {
-    SvtBroadcaster* pBC = new SvtBroadcaster;
-    maBroadcasters.set(nRow, pBC);
+    SvtBroadcaster* pBC = GetBroadcaster(nRow);
+    if (!pBC)
+    {
+        pBC = new SvtBroadcaster;
+        maBroadcasters.set(nRow, pBC);
+    }
     rLst.StartListening(*pBC);
 }
 
-- 
cgit