tdf#89329: use unique_ptr for pImpl in transfer

Change-Id: Ia28a7bd63c8f3a06ef2fd508619bae3a31af450c
Reviewed-on: https://gerrit.libreoffice.org/25479Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noelgrandin@gmail.com>

include/svtools/transfer.hxx

@@ -481,7 +481,7 @@ struct TransferDataContainer_Impl;
 
 class SVT_DLLPUBLIC TransferDataContainer : public TransferableHelper
 {
-    TransferDataContainer_Impl* pImpl;
+    std::unique_ptr<TransferDataContainer_Impl> pImpl;
 
 protected:
 

svtools/source/misc/transfer2.cxx

@@ -344,7 +344,6 @@ TransferDataContainer::TransferDataContainer()
 
 TransferDataContainer::~TransferDataContainer()
 {
-    delete pImpl;
 }