notifications regression: NotificationClosed emitted with wrong type

[The-Compiler]

Description

When a notification is closed, NotificationClosed is emitted with uint32, int32 as arguments (id, reason) while the specification mandates uint32 for both.

Budgie version

budgie-desktop 10.6.1

This seems to be a recent regression: On a fresh Solus 4.3 install I can't reproduce, only after a full update.

Operating system

Solus 4.3

Steps to reproduce the issue

• Run dbus-monitor interface=org.freedesktop.Notifications
• Trigger a notification, e.g. by running notify-send foo in another terminal

Actual result

signal time=1651502524.321176 sender=:1.42 -> destination=(null destination) serial=73 path=/org/freedesktop/Notifications; interface=org.freedesktop.Notifications; member=NotificationClosed
   uint32 2
   int32 2

Expected result

uint32 2 for both arguments

Additional information

This currently causes qutebrowser to crash when a notification is closed - will add a workaround there too.

[EbonJaeger]

I neglected to realize that enum values are int32 not uint32. Just made a PR to fix that. Sorry for the inconvenience!