[gnome-shell] magnifier: Update zoom region right after enabling the magnifier

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

commit 7bf8f40c84e7fb697f39b145252a7467cbb2ab73
Author: Jonas Dreßler <verdre v0yd nl>
Date:   Tue Mar 8 12:55:00 2022 +0100

    magnifier: Update zoom region right after enabling the magnifier
    
    We want the zoom region to always be where the mouse cursor is, so make
    sure to update it initially, too.
    
    Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2234>

 js/ui/magnifier.js | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/js/ui/magnifier.js b/js/ui/magnifier.js
index 0585e8812e..8ff062ba11 100644
--- a/js/ui/magnifier.js
+++ b/js/ui/magnifier.js
@@ -215,6 +215,8 @@ var Magnifier = class Magnifier {
         if (!this._pointerWatch) {
             let interval = 1000 / 60;
             this._pointerWatch = PointerWatcher.getPointerWatcher().addWatch(interval, 
this.scrollToMousePos.bind(this));
+
+            this.scrollToMousePos();
         }
     }