Scheduler, observation, and New() tweaks.

Corrects a number of places where New() did not call ..(), and implements similar changes to attempt to ensure New()/initialize() complete running before qdel() runs.
Cuts down on the number of created items during server start.

code/datums/helper_datums/getrev.dm

@@ -28,7 +28,6 @@ var/global/datum/getrev/revdata = new()
 	world.log << branch
 	world.log << date
 	world.log << revision
-	return
 
 client/verb/showrevinfo()
 	set category = "OOC"
@@ -43,4 +42,3 @@ client/verb/showrevinfo()
 			src << revdata.revision
 	else
 		src << "Revision unknown"
-	return

code/datums/mind.dm

@@ -63,7 +63,7 @@
 
 /datum/mind/New(var/key)
 	src.key = key
-
+	..()
 
 /datum/mind/proc/transfer_to(mob/living/new_character)
 	if(!istype(new_character))

code/datums/observation/observation.dm

@@ -9,13 +9,15 @@
 	return ..()
 
 /datum/observ/proc/register(var/datum/procOwner, var/proc_call)
+	if(!(procOwner && procOwner.destruction))
+		return
 	if(!listeners)
 		listeners = list()
 	listeners[procOwner] = proc_call
 	procOwner.destruction.register(src, /datum/observ/proc/unregister)
 
 /datum/observ/proc/unregister(var/datum/procOwner)
-	if(!listeners)
+	if(!(listeners && procOwner && procOwner.destruction))
 		return
 	listeners -= procOwner
 	procOwner.destruction.unregister(src)
@@ -37,7 +39,6 @@
 	..()
 
 /datum/Destroy()
-	destruction.raise_event(list(src))
 	destroy_observers()
 	return ..()
 
@@ -45,12 +46,18 @@
 	destruction = new()
 
 /datum/proc/destroy_observers()
+	if(!destruction)
+		return FALSE
+
+	destruction.raise_event(list(src))
 	qdel(destruction)
 	destruction = null
+	return TRUE
 
 // This ensures that observer handlers don't create their own observer handlers, which create their own handlers, which create...
 /datum/observ/init_observers()
 	return
 
+// And this ensures that observer handlers don't attempt to notify others about their own death while being unable to.
 /datum/observ/destroy_observers()
 	return