[orca] Don't treat unknown coordinates as definitely off-screen

[Joanmarie Diggs <joanied src gnome org>]

commit 7740829c4af7582e1918d8177428f7f0cb2ac3db
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Mon Dec 7 17:40:59 2020 +0100

    Don't treat unknown coordinates as definitely off-screen
    
    Apparently (-1, -1, -1, -1) is being used to specify an undetermined
    bounding box. Therefore do not automatically treat an object with
    these coordinates as off-screen. This will hopefully solve the flat
    review failure seen with apps written in Gtk+ 3.24.24.

 src/orca/script_utilities.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/orca/script_utilities.py b/src/orca/script_utilities.py
index 8fa931449..2ed14f520 100644
--- a/src/orca/script_utilities.py
+++ b/src/orca/script_utilities.py
@@ -1974,7 +1974,7 @@ class Utilities:
             debug.println(debug.LEVEL_INFO, msg, True)
             return False
 
-        if box.x < 0 and box.y < 0:
+        if box.x < 0 and box.y < 0 and tuple(box) != (-1, -1, -1, -1):
             msg = "INFO: %s has negative coordinates" % obj
             debug.println(debug.LEVEL_INFO, msg, True)
             return False