[gthumb] realize the window to get the screen size at start-up

[Paolo Bacchilega <paobac src gnome org>]

commit 5d158784250212122d069282ea2f831c80fa9bb3
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Thu Dec 19 11:19:41 2019 +0100

    realize the window to get the screen size at start-up

 gthumb/gth-browser.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/gthumb/gth-browser.c b/gthumb/gth-browser.c
index 886eaa63..ac00fcac 100644
--- a/gthumb/gth-browser.c
+++ b/gthumb/gth-browser.c
@@ -4314,6 +4314,7 @@ gth_browser_init (GthBrowser *browser)
                int default_columns_of_thumbnails;
                int n_cols;
 
+               gtk_widget_realize (GTK_WIDGET (browser));
                _gtk_widget_get_screen_size (GTK_WIDGET (browser), &max_width, &max_height);
                max_width = max_width * 5 / 6;
                max_height = max_height * 3 / 4;