get messagebox dispose ordering right.

Change-Id: Ia7085cf98141fdbd50cf9cc9ed45e2e0c09e448e
diff --git a/vcl/source/window/layout.cxx b/vcl/source/window/layout.cxx
index 34de14a..3bc1a63 100644
--- a/vcl/source/window/layout.cxx
+++ b/vcl/source/window/layout.cxx
@@ -2034,13 +2034,13 @@ void MessageDialog::dispose()
        m_aOwnedButtons[i].disposeAndClear();
    m_aOwnedButtons.clear();

    m_pSecondaryMessage.clear();
    m_pSecondaryMessage.clear();
    m_pImage.clear();
    m_pPrimaryMessage.disposeAndClear();
    m_pSecondaryMessage.disposeAndClear();
    m_pSecondaryMessage.disposeAndClear();
    m_pImage.disposeAndClear();
    m_pGrid.disposeAndClear();
    m_pOwnedActionArea.disposeAndClear();
    m_pOwnedContentArea.disposeAndClear();
    m_pPrimaryMessage.clear();
    Dialog::dispose();
}