wayland: Fix suspend input locking after timeout

This commit fixes input locking when suspend was invoked autoatically
after a certain amount of time.

Previously, it would invoke the lockscreen first, then dim the screen
and finally suspend the machine. While suspending it would invoke the
lockscreen *again* however, which seems to lead to generally locking
input (perhaps 2 instances of waylock disable each others' input
ability?).

This change checks for a running lockscreen first before invoking
another one, which should hopefully fix the issue.

wayland/.config/river/init

@@ -250,12 +250,12 @@ exec kanshi &
 # start screen idle locking/dimming/sleep tool
 killall swayidle
 exec swayidle \
-    timeout "${time_to_lockscreen}" 'lockscreen' \
+    timeout "${time_to_lockscreen}" 'pidof waylock || lockscreen' \
     timeout "${time_to_screendim}" 'wlopm --off "*"' \
     timeout "${time_to_suspend}" 'systemctl suspend-then-hibernate' \
     resume 'wlopm --on "*"' \
     after-resume 'wlopm --on "*"' \
-    before-sleep 'lockscreen' &
+    before-sleep 'pidof waylock || lockscreen' &
 
 killall clipman
 exec wl-paste -t text --watch clipman store &