hyprland/workspaces: fix crash on monitor off/on

[andresilva]

Waybar would crash after turning off/on monitor (especially after hyprwm/Hyprland#3713).

Might fix #2039 and #2015.

[Alexays]

Nice thanks!

[Faugus]

It is still crashing on my system everytime I turn off and on my monitor.

Arch / Hyprland
Waybar v0.9.24

[faugus@archlinux ~]$ waybar
[2023-12-07 17:06:16.239] [info] Using configuration file /home/faugus/.config/waybar/config
[2023-12-07 17:06:16.240] [info] Discovered appearance 'dark'
[2023-12-07 17:06:16.240] [info] Using CSS file /home/faugus/.config/waybar/style.css
[2023-12-07 17:06:16.242] [warning] Mapping is not an object
[2023-12-07 17:06:16.243] [info] Hyprland IPC starting
[2023-12-07 17:06:16.253] [info] Bar configured (width: 2560, height: 40) for output: DP-1
basic_string::_M_create
[2023-12-07 17:06:18.887] [info] Bar removed from output: DP-1
Segmentation fault (core dumped)
[faugus@archlinux ~]$