streamlining dreams

no calling by clientless mobs, this should save several thousand wasted calls.
turning the massive string list that would be defined each call into a global list.
the chance the same dream gets picked twice is negletable.

code/modules/flufftext/Dreaming.dm

@@ -1,5 +1,4 @@
-mob/living/carbon/proc/dream()
-	dreaming = 1
+
 var/list/dreams = list(
 	"an ID card","a bottle","a familiar face","a crewmember","a toolbox","a security officer","the captain",
 	"voices from all around","deep space","a doctor","the engine","a traitor","an ally","darkness",
@@ -14,11 +13,13 @@ mob/living/carbon/proc/dream()
 	"a beach","the holodeck","a smokey room","a voice","the cold","a mouse","an operating table","the bar","the rain","a skrell",
 	"a unathi","a tajaran","the ai core","the mining station","the research station","a beaker of strange liquid",
 	)
+
+mob/living/carbon/proc/dream()
+	dreaming = 1
+
 	spawn(0)
 		for(var/i = rand(1,4),i > 0, i--)
-			var/dream_image = pick(dreams)
-			dreams -= dream_image
-			src << "\blue <i>... [dream_image] ...</i>"
+			src << "\blue <i>... [pick(dreams)] ...</i>"
 			sleep(rand(40,70))
 			if(paralysis <= 0)
 				dreaming = 0
@@ -27,6 +28,7 @@ mob/living/carbon/proc/dream()
 		return 1
 
 mob/living/carbon/proc/handle_dreams()
-	if(prob(5) && !dreaming) dream()
+	if(client && !dreaming && prob(5))
+		dream()
 
 mob/living/carbon/var/dreaming = 0