[gnome-shell-extensions] window-list: Fix resetting handler ID

[Florian Müllner <fmuellner src gnome org>]

commit 2ef6dba0a58c24c80eea26d4d72ec2f8dbb54c10
Author: Florian Müllner <fmuellner gnome org>
Date:   Sat Jun 29 02:52:45 2019 +0200

    window-list: Fix resetting handler ID
    
    This is embarrassing, although destroy() is expected to only run once,
    so the bug shouldn't have an effect in practice.
    
    https://gitlab.gnome.org/GNOME/gnome-shell-extensions/merge_requests/78

 extensions/window-list/windowPicker.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/extensions/window-list/windowPicker.js b/extensions/window-list/windowPicker.js
index 024fd80..cd0644d 100644
--- a/extensions/window-list/windowPicker.js
+++ b/extensions/window-list/windowPicker.js
@@ -255,6 +255,6 @@ class WindowPickerToggle extends St.Button {
     _onDestroy() {
         if (this._overlayKeyId)
             global.display.disconnect(this._overlayKeyId);
-        this._overlayKeyId == 0;
+        this._overlayKeyId = 0;
     }
 });