[mutter] tests/respect-constraints: Explicitly set monitor size

[Marge Bot <marge-bot src gnome org>]

commit a25081ffb5c208caf8312bf5eea43086c655f0fb
Author: Jonas Ådahl <jadahl gmail com>
Date:   Wed Aug 3 18:59:36 2022 +0200

    tests/respect-constraints: Explicitly set monitor size
    
    The test depends on a certain monitor size; make sure to set that up
    front.
    
    Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2554>

 src/tests/stacking/client-resize-respect-constraints.metatest | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/src/tests/stacking/client-resize-respect-constraints.metatest 
b/src/tests/stacking/client-resize-respect-constraints.metatest
index 021e0ed0e3..fd524784ea 100644
--- a/src/tests/stacking/client-resize-respect-constraints.metatest
+++ b/src/tests/stacking/client-resize-respect-constraints.metatest
@@ -4,6 +4,8 @@
 #  3. Resize such that the following resize will extend beyond the screen
 #  4. Check that the window was moved to the position that would allow it to fit on the screen
 
+resize_monitor primary 800 600
+
 new_client w wayland
 create w/1 csd