[gthumb] dialog size: realize the dialog before getting its screen size

[Paolo Bacchilega <paobac src gnome org>]

commit f2eab2daf570125147b261dcb508ee5607d16e72
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Sun Apr 21 11:57:56 2019 +0200

    dialog size: realize the dialog before getting its screen size

 gthumb/gtk-utils.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/gthumb/gtk-utils.c b/gthumb/gtk-utils.c
index 7470080f..861b04f3 100644
--- a/gthumb/gtk-utils.c
+++ b/gthumb/gtk-utils.c
@@ -680,6 +680,7 @@ _gtk_window_resize_to_fit_screen_height (GtkWidget *window,
 {
        int screen_height;
 
+       gtk_widget_realize (window);
        _gtk_widget_get_screen_size (window, NULL, &screen_height);
        if (screen_height < 768)
                /* maximize on netbooks */