tdf#89329: Use unique_ptr for pImpl in numberingtypelistbox

Change-Id: I418868bc3415699f1c07ee57b556eb39e7b7c57d
Reviewed-on: https://gerrit.libreoffice.org/34185Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

sw/source/uibase/inc/numberingtypelistbox.hxx

@@ -40,7 +40,7 @@ struct SwNumberingTypeListBox_Impl;
 
 class SW_DLLPUBLIC SwNumberingTypeListBox : public ListBox
 {
-    SwNumberingTypeListBox_Impl* pImpl;
+    std::unique_ptr<SwNumberingTypeListBox_Impl> pImpl;
 
 public:
     SwNumberingTypeListBox( vcl::Window* pWin, WinBits nStyle );

sw/source/uibase/misc/numberingtypelistbox.cxx

@@ -73,7 +73,7 @@ SwNumberingTypeListBox::~SwNumberingTypeListBox()
 
 void SwNumberingTypeListBox::dispose()
 {
-    delete pImpl;
+    pImpl.reset();
     ListBox::dispose();
 }