Event manager tweaks.

Moves the event manager processing into the process itself.
Ensures the last_object var is properly set in case of issues.
Also fixes a potential risk of the camera damage event looping forever.

code/controllers/Processes/event.dm

@@ -3,4 +3,13 @@
 	schedule_interval = 20 // every 2 seconds
 
 /datum/controller/process/event/doWork()
-	event_manager.process()
+	for(last_object in event_manager.active_events)
+		var/datum/event/E = last_object
+		E.process()
+		SCHECK
+
+	for(var/i = EVENT_LEVEL_MUNDANE to EVENT_LEVEL_MAJOR)
+		last_object = event_manager.event_containers[i]
+		var/list/datum/event_container/EC = last_object
+		EC.process()
+		SCHECK