[glom] DialogImageLoad/SaveProgress: Correct MessageDialog code

[Murray Cumming <murrayc src gnome org>]

commit 7c67c186b982bf1534e9004dc285022e4ec94843
Author: Murray Cumming <murrayc murrayc com>
Date:   Tue Dec 4 16:30:09 2018 +0100

    DialogImageLoad/SaveProgress: Correct MessageDialog code
    
    Recent versions of gcc helpfully notice that this was passing an
    enum value for a bool parameter:
    
    warning: enum constant in boolean context [-Wint-in-bool-context]

 glom/utility_widgets/dialog_image_load_progress.cc | 2 +-
 glom/utility_widgets/dialog_image_save_progress.cc | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/glom/utility_widgets/dialog_image_load_progress.cc 
b/glom/utility_widgets/dialog_image_load_progress.cc
index ea7747f4..6d2e45fe 100644
--- a/glom/utility_widgets/dialog_image_load_progress.cc
+++ b/glom/utility_widgets/dialog_image_load_progress.cc
@@ -157,7 +157,7 @@ void DialogImageLoadProgress::on_read_next(unsigned int at)
 
 void DialogImageLoadProgress::error(const Glib::ustring& error_message)
 {
-  Gtk::MessageDialog dialog(*this, Glib::ustring::compose(_("Error loading %1"), m_file->get_parse_name()), 
Gtk::MESSAGE_ERROR);
+  Gtk::MessageDialog dialog(*this, Glib::ustring::compose(_("Error loading %1"), m_file->get_parse_name()), 
false, Gtk::MESSAGE_ERROR);
   dialog.set_title(_("Error loading image"));
   dialog.set_secondary_text(error_message);
 
diff --git a/glom/utility_widgets/dialog_image_save_progress.cc 
b/glom/utility_widgets/dialog_image_save_progress.cc
index b4a5a701..4a750eb7 100644
--- a/glom/utility_widgets/dialog_image_save_progress.cc
+++ b/glom/utility_widgets/dialog_image_save_progress.cc
@@ -130,7 +130,7 @@ void DialogImageSaveProgress::on_stream_write(const Glib::RefPtr<Gio::AsyncResul
 
 void DialogImageSaveProgress::error(const Glib::ustring& error_message)
 {
-  Gtk::MessageDialog dialog(*this, _("Error Saving"), Gtk::MESSAGE_ERROR);
+  Gtk::MessageDialog dialog(*this, _("Error Saving"), false, Gtk::MESSAGE_ERROR);
   dialog.set_title(_("Error saving image"));
   dialog.set_secondary_text(error_message);