Explicit virtual dtor needed for auto_ptr member for MSVC.

Else it won't build.

Change-Id: I6d857ffc7a444abaf477ee820e577757287a707c

formula/source/ui/dlg/formula.cxx

@@ -1654,6 +1654,8 @@ FormulaModalDialog::FormulaModalDialog( Window* pParent
     SetText(m_pImpl->aTitle1);
 }
 
+FormulaModalDialog::~FormulaModalDialog() {}
+
 void FormulaModalDialog::Update(const OUString& _sExp)
 {
     m_pImpl->Update(_sExp);
@@ -1738,6 +1740,8 @@ FormulaDlg::FormulaDlg( SfxBindings* pB, SfxChildWindow* pCW,
     SetText(m_pImpl->aTitle1);
 }
 
+FormulaDlg::~FormulaDlg() {}
+
 void FormulaDlg::Update(const OUString& _sExp)
 {
     m_pImpl->Update(_sExp);

include/formula/formula.hxx

@@ -56,6 +56,8 @@ public:
                                             , bool _bSupportMatrix
                                             ,IFunctionManager* _pFunctionMgr
                                             ,IControlReferenceHandler* _pDlg = NULL );
+    virtual ~FormulaModalDialog();
+
 private:
     SAL_WNODEPRECATED_DECLARATIONS_PUSH
     ::std::auto_ptr<FormulaDlg_Impl> m_pImpl;
@@ -95,6 +97,7 @@ public:
                                     , bool _bSupportMatrix
                                     , IFunctionManager* _pFunctionMgr
                                     , IControlReferenceHandler* _pDlg = NULL );
+    virtual ~FormulaDlg();
 private:
     SAL_WNODEPRECATED_DECLARATIONS_PUSH
     ::std::auto_ptr<FormulaDlg_Impl> m_pImpl;