Fix 'AddressSanitizer: container-overflow' problem detected on OS X

Patch by Noel. Committed and this message written by tml, who doesn't
fully understand what the code does, but this definitely fixes the
problem.

Change-Id: Ifdc9faac0323028fa2888eb4a2d68e6ae5a905ae

sd/source/ui/framework/configuration/ConfigurationControllerBroadcaster.cxx

@@ -165,8 +165,8 @@ void ConfigurationControllerBroadcaster::DisposeAndClear()
         }
         else
         {
-            Reference<lang::XEventListener> xListener (
-                iMap->second.front().mxListener, UNO_QUERY);
+            Reference<XConfigurationChangeListener> xListener (
+                iMap->second.front().mxListener );
             if (xListener.is())
             {
                 // Tell the listener that the configuration controller is
@@ -174,7 +174,7 @@ void ConfigurationControllerBroadcaster::DisposeAndClear()
                 // types).
                 try
                 {
-                    RemoveListener(iMap->second.front().mxListener);
+                    RemoveListener(xListener);
                     xListener->disposing(aEvent);
                 }
                 catch (const RuntimeException&)