ofz#6208 Indirect-leak

Change-Id: I8d6761bd951cc1ddd4a45eabb26428bc40c2271a
Reviewed-on: https://gerrit.libreoffice.org/49600Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

lotuswordpro/inc/xfilter/xfcontent.hxx

@@ -105,6 +105,7 @@ public:
 protected:
     XFContent()
         : m_bDoingToXml(false)
+        , m_bInserted(false)
     {
     }
 
@@ -115,6 +116,8 @@ protected:
     OUString m_strStyleName;
 private:
     bool m_bDoingToXml;
+public:
+    bool m_bInserted;
 };
 
 #endif

lotuswordpro/source/filter/xfilter/xfcontentcontainer.cxx

@@ -70,6 +70,9 @@ XFContentContainer::~XFContentContainer()
 
 void XFContentContainer::Add(XFContent *pContent)
 {
+    if (pContent->m_bInserted)
+        throw std::runtime_error("already inserted");
+    pContent->m_bInserted = true;
     m_aContents.emplace_back(pContent);
 }