rem: if ( scrolled_window_etat && GTK_BIN ( scrolled_window_etat ) -> child )
add: if ( scrolled_window_etat && GTK_IS_WIDGET ( scrolled_window_etat ) && GTK_BIN ( scrolled_window_etat ) -> child )
context: void gsb_gui_unsensitive_report_widgets (){    if ( scrolled_window_etat && GTK_BIN ( scrolled_window_etat ) -> child )	gtk_widget_hide ( GTK_BIN ( scrolled_window_etat ) -> child );    gtk_widget_set_sensitive ( bouton_personnaliser_etat, FALSE );    gtk_widget_set_sensitive ( bouton_imprimer_etat, FALSE );    gtk_widget_set_sensitive ( bouton_exporter_etat, FALSE );    gtk_widget_set_sensitive ( bouton_dupliquer_etat, FALSE );    gtk_widget_set_sensitive ( bouton_effacer_etat, FALSE );}