another memory leak based on release().release()

Thanks Michael Meeks for noticing.

Change-Id: I8c27215d3cf4624a19f4fd905758e588b342c6c9

sc/source/core/tool/chartlis.cxx

@@ -499,24 +499,6 @@ void ScChartListenerCollection::ChangeListening( const OUString& rName,
         pCL->SetDirty( true );
 }
 
-namespace {
-
-class InsertChartListener : public std::unary_function<ScChartListener*, void>
-{
-    ScChartListenerCollection::ListenersType& mrListeners;
-public:
-    InsertChartListener(ScChartListenerCollection::ListenersType& rListeners) :
-        mrListeners(rListeners) {}
-
-    void operator() (ScChartListener* p)
-    {
-        OUString aName = p->GetName();
-        mrListeners.insert(aName, p);
-    }
-};
-
-}
-
 void ScChartListenerCollection::FreeUnused()
 {
     ListenersType aUsed, aUnused;
@@ -550,29 +532,21 @@ void ScChartListenerCollection::FreeUnused()
 void ScChartListenerCollection::FreeUno( const uno::Reference< chart::XChartDataChangeEventListener >& rListener,
                                          const uno::Reference< chart::XChartData >& rSource )
 {
-    std::vector<ScChartListener*> aUsed, aUnused;
+    ListenersType aUsed, aUnused;
 
     // First, filter each listener into 'used' and 'unused' categories.
     {
-        ListenersType::iterator it = maListeners.begin(), itEnd = maListeners.end();
-        for (; it != itEnd; ++it)
+        while(!maListeners.empty())
         {
-            ScChartListener* p = it->second;
+            ScChartListener* p = maListeners.begin()->second;
             if (p->IsUno() && p->GetUnoListener() == rListener && p->GetUnoSource() == rSource)
-                aUnused.push_back(p);
+                aUnused.transfer(maListeners.begin(), maListeners);
             else
-                aUsed.push_back(p);
+                aUsed.transfer(maListeners.begin(), maListeners);
         }
     }
 
-    // Release all pointers currently managed by the ptr_map container.
-    maListeners.release().release();
-
-    // Re-insert the listeners we need to keep.
-    std::for_each(aUsed.begin(), aUsed.end(), InsertChartListener(maListeners));
-
-    // Now, delete the ones no longer needed.
-    std::for_each(aUnused.begin(), aUnused.end(), boost::checked_deleter<ScChartListener>());
+    std::swap(aUsed, maListeners);
 }
 
 void ScChartListenerCollection::StartTimer()