[glom] Convert some protected API to private.

[Murray Cumming <murrayc src gnome org>]

commit ada5b1aeb528a7c6b669eda749bc63a2adbd1252
Author: Murray Cumming <murrayc murrayc com>
Date:   Tue Nov 3 20:02:43 2015 +0100

    Convert some protected API to private.

 glom/libglom/document/document.h |    2 +-
 glom/variablesmap.h              |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/glom/libglom/document/document.h b/glom/libglom/document/document.h
index dfc6c17..58125a7 100644
--- a/glom/libglom/document/document.h
+++ b/glom/libglom/document/document.h
@@ -479,7 +479,7 @@ public:
   static Glib::ustring extract_backup_file(const Glib::ustring& backup_uri, std::string& backup_path, const 
SlotProgress& slot_progress);
   
 
-protected:
+private:
 
 
 #endif //SWIG
diff --git a/glom/variablesmap.h b/glom/variablesmap.h
index cccbf06..9ff8cc1 100644
--- a/glom/variablesmap.h
+++ b/glom/variablesmap.h
@@ -68,7 +68,7 @@ public:
   ///Transfer data from the variable to the widget.
   void transfer_variables_to_widgets();
 
-protected:
+private:
 
   /** Override this to validate the data that the user enters into the widgets.
    * The return value indicates whether the widgets' data is valid.