invalidate used slot to avoid inconsistent state information

Invalid state information may cause crashes due to not updated slot data

(cherry picked from commit 7267a4b8)

Change-Id: I3bc3f934c5144fb0873e7a9694c3c012ddb0b367

sfx2/source/control/ctrlitem.cxx

@@ -384,6 +384,11 @@ SfxMapUnit SfxControllerItem::GetCoreMetric() const
             SfxShell *pSh = pDispat->GetShell( pServer->GetShellLevel() );
             SfxItemPool &rPool = pSh->GetPool();
             sal_uInt16 nWhich = rPool.GetWhich( nId );
+
+            // invalidate slot and its message|slot server as 'global' information
+            // about the validated message|slot server is not made available
+            pCache->Invalidate( sal_True );
+
             return rPool.GetMetric( nWhich );
         }
     }