missing nullptr.

Change-Id: Iea2124d0b485e051df1136f63ba4113b2dbc6f84
diff --git a/writerperfect/source/writer/WordPerfectImportFilter.cxx b/writerperfect/source/writer/WordPerfectImportFilter.cxx
index b60e592..8d484dd 100644
--- a/writerperfect/source/writer/WordPerfectImportFilter.cxx
+++ b/writerperfect/source/writer/WordPerfectImportFilter.cxx
@@ -303,7 +303,7 @@ throw (RuntimeException, std::exception)
        int unsuccessfulAttempts = 0;
        while (true)
        {
            ScopedVclPtrInstance< SfxPasswordDialog > aPasswdDlg(0);
            ScopedVclPtrInstance< SfxPasswordDialog > aPasswdDlg(nullptr);
            aPasswdDlg->SetMinLen(0);
            if (!aPasswdDlg->Execute())
                return com::sun::star::ui::dialogs::ExecutableDialogResults::CANCEL;