wrap dialog subclass in ScopedVclPtrInstance

Change-Id: I79b982ffa121cc38c467f79bd56d498abd4f8cac

cui/source/options/optinet2.cxx

@@ -836,12 +836,10 @@ IMPL_LINK_NOARG(SvxSecurityTabPage, TSAURLsPBHdl)
     // Unlike the mpCertPathDlg, we *don't* keep the same dialog object around between
     // invocations. Seems clearer to my little brain that way.
 
-    TSAURLsDialog* pTSAURLsDlg = new TSAURLsDialog(this);
+    ScopedVclPtrInstance<TSAURLsDialog> pTSAURLsDlg(this);
 
     pTSAURLsDlg->Execute();
 
-    delete pTSAURLsDlg;
-
     return 0;
 }