[gnome-shell] boxpointer: Fix coordinate

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

commit 6f7df32b0ef1399f0ebcba420ad765a49ff9d34b
Author: Florian Müllner <fmuellner gnome org>
Date:   Fri Aug 13 02:58:33 2021 +0200

    boxpointer: Fix coordinate
    
    Eeeks. Spotted by coverity in CID 351259.
    
    Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1950>

 js/ui/boxpointer.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/js/ui/boxpointer.js b/js/ui/boxpointer.js
index 82d28cd834..c7a8f92d01 100644
--- a/js/ui/boxpointer.js
+++ b/js/ui/boxpointer.js
@@ -556,7 +556,7 @@ var BoxPointer = GObject.registerClass({
                 arrowOrigin = y1;
             } else if (arrowOrigin >= (y2 - (borderRadius + halfBase))) {
                 if (arrowOrigin < y2)
-                    resX -= y2 - arrowOrigin;
+                    resY -= y2 - arrowOrigin;
                 arrowOrigin = y2;
             }
             break;