Prevent possible memory leak by adding virtual destructor

Hi,

This patch add a virtual destructor to all classes from
WW8ResourceModel.hxx with virtual methods to prevent memory leaks likes rtf
few days ago almost from docx import filter.

Thanks

Best regards

-- 
Arnaud Versini

From c2054880238124c6cdc9b1fe7d14e9b10721decb Mon Sep 17 00:00:00 2001
From: Arnaud Versini <arnaud.versini@gmail.com>
Date: Tue, 13 Mar 2012 20:41:38 +0100
Subject: [PATCH] Adding virtual destructor to WW8ResourceModel.hxx classes

---
 .../inc/resourcemodel/WW8ResourceModel.hxx         |   13 +++++++++++++
 1 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/writerfilter/inc/resourcemodel/WW8ResourceModel.hxx 
b/writerfilter/inc/resourcemodel/WW8ResourceModel.hxx
index 9504b6f..5869f04 100644
--- a/writerfilter/inc/resourcemodel/WW8ResourceModel.hxx
+++ b/writerfilter/inc/resourcemodel/WW8ResourceModel.hxx
@@ -128,6 +128,9 @@ class Sprm;
 class WRITERFILTER_RESOURCEMODEL_DLLPUBLIC Properties
 {
 public:
+
+    virtual ~Properties() {}
+
     /**
        Receives an attribute.
 
@@ -152,6 +155,8 @@ class WRITERFILTER_RESOURCEMODEL_DLLPUBLIC Table
 {
 public:
     typedef boost::shared_ptr<Table> Pointer_t;
+
+    virtual ~Table() {}
     /**
        Receives an entry of the table.
 
@@ -167,6 +172,8 @@ public:
 class WRITERFILTER_RESOURCEMODEL_DLLPUBLIC BinaryObj
 {
 public:
+
+    virtual ~BinaryObj() {}
     /**
        Receives binary data of the object.
 
@@ -184,11 +191,14 @@ public:
 class WRITERFILTER_RESOURCEMODEL_DLLPUBLIC Stream
 {
 public:
+
     /**
        Pointer to this stream.
      */
     typedef boost::shared_ptr<Stream> Pointer_t;
 
+    virtual ~Stream() {}
+
     /**
        Receives start mark for group with the same section properties.
      */
@@ -344,6 +354,9 @@ public:
     typedef auto_ptr<Sprm> Pointer_t;
     SAL_WNODEPRECATED_DECLARATIONS_POP
     enum Kind { UNKNOWN, CHARACTER, PARAGRAPH, TABLE };
+
+    virtual ~Sprm() {}
+
     /**
        Returns id of the SPRM.
      */
-- 
1.7.5.4