Replace deprecated std::mem_fun et al in extensions

(as std::mem_fun is gone by default at least from recent libc++ in C++17 mode)

Change-Id: I109dd7e04ed2914eb8768bb8139758b5ad60dadc
Reviewed-on: https://gerrit.libreoffice.org/45862Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

extensions/source/propctrlr/propertyeditor.cxx

@@ -273,7 +273,7 @@ namespace pcr
     }
 
 
-    void OPropertyEditor::Update(const std::mem_fun_t<void,OBrowserListBox>& _aUpdateFunction)
+    void OPropertyEditor::Update(const std::function<void(OBrowserListBox *)>& _aUpdateFunction)
     {
         // forward this to all our pages
         sal_uInt16 nCount = m_aTabControl->GetPageCount();
@@ -288,12 +288,12 @@ namespace pcr
 
     void OPropertyEditor::EnableUpdate()
     {
-        Update(std::mem_fun(&OBrowserListBox::EnableUpdate));
+        Update(std::mem_fn(&OBrowserListBox::EnableUpdate));
     }
 
     void OPropertyEditor::DisableUpdate()
     {
-        Update(std::mem_fun(&OBrowserListBox::DisableUpdate));
+        Update(std::mem_fn(&OBrowserListBox::DisableUpdate));
     }
 
 

extensions/source/propctrlr/propertyeditor.hxx

@@ -120,7 +120,7 @@ namespace pcr
         OBrowserPage* getPage( const OUString& _rPropertyName );
         const OBrowserPage* getPage( const OUString& _rPropertyName ) const;
 
-        void Update(const std::mem_fun_t<void,OBrowserListBox>& _aUpdateFunction);
+        void Update(const std::function<void(OBrowserListBox *)>& _aUpdateFunction);
 
         typedef void (OPropertyEditor::*PageOperation)( OBrowserPage&, const void* );
         void    forEachPage( PageOperation _pOperation );