[gparted] modern-gtk2: Use Gtk::ComboBoxText::append() (!17)

[Mike Fleetwood <mfleetwo src gnome org>]

commit 3f1831830419760ee719e87426aa22a63b6949ac
Author: Luca Bacci <luca bacci982 gmail com>
Date:   Fri Aug 10 09:33:47 2018 +0200

    modern-gtk2: Use Gtk::ComboBoxText::append() (!17)
    
    Gtk::ComboBoxText::append_text() was deprecated in gtkmm 2.24.  Replace
    with Gtk::ComboBoxText::append().
    
    References:
    https://developer.gnome.org/gtkmm/2.24/classGtk_1_1ComboBoxText.html
    https://gitlab.gnome.org/GNOME/gtkmm/blob/2.24.0/NEWS#L20
    
    Closes !17 - Gtk2 modernisation

 src/Dialog_Disklabel.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/Dialog_Disklabel.cc b/src/Dialog_Disklabel.cc
index a0c97993..315f7147 100644
--- a/src/Dialog_Disklabel.cc
+++ b/src/Dialog_Disklabel.cc
@@ -77,7 +77,7 @@ Dialog_Disklabel::Dialog_Disklabel( const Device & device )
                bool set_active = false ;
                for ( unsigned int t = 0 ; t < labeltypes .size() ; t ++ )
                {
-                       combo_labeltypes .append_text( labeltypes[ t ] ) ;
+                       combo_labeltypes.append(labeltypes[t]);
                        if ( default_label == labeltypes[ t ] )
                        {
                                combo_labeltypes .set_active( t ) ;