Fix AI tracking, karma message fix, karma say fix, robot storage sprite change

code/modules/karma/karma.dm

@@ -345,8 +345,8 @@ You've gained <b>[totalkarma]</b> total karma in your time here.<br>"}
 			message_admins("SQL ERROR during karmaspent updating (updating existing entry). Error: \[[err]\]\n")
 			return
 		else
-			usr << "You have been charged [cost] karma."
-			message_admins("[key_name(usr)] has been charged [cost] karma.")
+			usr << "You have been [refund ? refunded : charged] [cost] karma."
+			message_admins("[key_name(usr)] has been [refund ? refunded : charged] [cost] karma.")
 			return
 
 /client/proc/karmarefund(var/type,var/name,var/cost)

code/modules/mob/living/carbon/human/say.dm

@@ -304,7 +304,7 @@
 			handled = 1
 			if(prob(braindam/4))
 				message = stutter(message)
-				verb = pick("stammers", "stutters")
+				verb = pick("gibbers")
 			if(prob(braindam))
 				message = uppertext(message)
 				verb = "yells loudly"