added missing consts and pass objects by const reference instead of by value (patch 1205869)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@35665 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk1/filedlg.cpp

@@ -157,7 +157,7 @@ wxFileDialog::wxFileDialog(wxWindow *parent, const wxString& message,
         if (parent)
             gtk_parent = GTK_WINDOW( gtk_widget_get_toplevel(parent->m_widget) );
 
-        gchar* ok_btn_stock;
+        const gchar* ok_btn_stock;
         if ( style & wxSAVE )
         {
             gtk_action = GTK_FILE_CHOOSER_ACTION_SAVE;

src/gtk1/region.cpp

@@ -160,7 +160,7 @@ wxObjectRefData *wxRegion::CloneRefData(const wxObjectRefData *data) const
 // wxRegion comparison
 // ----------------------------------------------------------------------------
 
-bool wxRegion::operator==( const wxRegion& region )
+bool wxRegion::operator==( const wxRegion& region ) const
 {
     if (m_refData == region.m_refData) return TRUE;
 

src/gtk1/textctrl.cpp

@@ -164,7 +164,7 @@ extern "C" {
 static void wxGtkTextInsert(GtkWidget *text,
                             GtkTextBuffer *text_buffer,
                             const wxTextAttr& attr,
-                            wxCharBuffer buffer)
+                            const wxCharBuffer& buffer)
 
 {
     gint start_offset;