Fix floodlights not turning off when out of power, and fixes sling veil not working on them (#12222)

* Fix floodlights not turning off when out of power, and fixes sling veil not working on them

* Update yogstation/code/modules/antagonists/shadowling/shadowling_abilities.dm

Author: adamsong

code/modules/power/floodlight.dm

@@ -64,7 +64,7 @@
 	if((val < 1) || (val > light_setting_list.len))
 		return
 	active_power_usage = light_setting_list[val]
-	if(!avail(active_power_usage))
+	if(active_power_usage && !avail(active_power_usage))
 		return change_setting(val - 1)
 	setting = val
 	set_light(light_setting_list[val])

yogstation/code/modules/antagonists/shadowling/shadowling_abilities.dm

@@ -170,6 +170,10 @@
 			var/obj/mecha/M = LO
 			M.set_light(0)
 			M.lights = FALSE
+		if(istype(LO, /obj/machinery/power/floodlight))
+			var/obj/machinery/power/floodlight/FL = LO
+			FL.change_setting(2) // Set floodlight to lowest setting
+
 	for(var/obj/structure/glowshroom/G in orange(7, user)) //High radius because glowshroom spam wrecks shadowlings
 		if(!istype(G, /obj/structure/glowshroom/shadowshroom))
 			var/obj/structure/glowshroom/shadowshroom/S = new /obj/structure/glowshroom/shadowshroom(G.loc) //I CAN FEEL THE WARP OVERTAKING ME! IT IS A GOOD PAIN!