[libwnck] pager: don't return negative size

[Alberts Muktupāvels <muktupavels src gnome org>]

commit b1596999e7f5dbd8eb8d052e1a828506e491985b
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Wed Apr 28 01:28:48 2021 +0300

    pager: don't return negative size
    
    wnck_screen_get_workspace_count can return 0 if WnckScreen has
    not been updated yet.

 libwnck/pager.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/libwnck/pager.c b/libwnck/pager.c
index 32d146b..c1d4f43 100644
--- a/libwnck/pager.c
+++ b/libwnck/pager.c
@@ -622,7 +622,7 @@ wnck_pager_get_preferred_width_for_height (GtkWidget *widget,
                                                                 workspace_height);
 
   width += workspace_width * spaces_per_row + (spaces_per_row - 1);
-  *natural_width = *minimum_width = width;
+  *natural_width = *minimum_width = MAX (width, 0);
 }
 
 static void
@@ -684,7 +684,7 @@ wnck_pager_get_preferred_height_for_width (GtkWidget *widget,
                                                                  workspace_width);
 
   height += workspace_height * spaces_per_row + (spaces_per_row - 1);
-  *natural_height = *minimum_height = height;
+  *natural_height = *minimum_height = MAX (height, 0);
 }
 
 static gboolean