coverity#736028 Invalid iterator comparison

Change-Id: I3ecb621d124c873556387e3bc5cfd5b9aadd8fc1

1 files changed, 3 insertions, 2 deletions

diff --git a/oox/source/drawingml/diagram/diagram.cxx b/oox/source/drawingml/diagram/diagram.cxx
index 4a8f78416eec..8741353d2774 100644
--- a/oox/source/drawingml/diagram/diagram.cxx
+++ b/oox/source/drawingml/diagram/diagram.cxx
@@ -295,8 +295,9 @@ void Diagram::build(  )
     }
 
     // assign outline levels
-    DiagramData::StringMap::iterator aPresOfIter=getData()->getPresOfNameMap().begin();
-    const DiagramData::StringMap::iterator aPresOfEnd=getData()->getPresOfNameMap().end();
+    DiagramData::StringMap& rStringMap = getData()->getPresOfNameMap();
+    DiagramData::StringMap::iterator aPresOfIter=rStringMap.begin();
+    const DiagramData::StringMap::iterator aPresOfEnd=rStringMap.end();
     while( aPresOfIter != aPresOfEnd )
     {
         DiagramData::StringMap::value_type::second_type::iterator aPresOfNodeIterCalcLevel=aPresOfIter->second.begin();