Updated Alchemists description to better fit the class

git-svn-id: http://svn.net-core.org/repos/t-engine4@2382 51575b47-30f0-44d4-a5cc-537603b46e54

game/engines/default/engine/interface/ActorAI.lua

@@ -132,6 +132,7 @@ function _M:doAI()
 end
 
 function _M:runAI(ai)
+	if not ai then return end
 	return _M.ai_def[ai](self)
 end
 

game/modules/tome/data/birth/classes/mage.lua

@@ -98,10 +98,10 @@ newBirthDescriptor{
 	type = "subclass",
 	name = "Alchemist",
 	desc = {
-		"An Alchemist is a dabbler in magic, while 'true' magic is thought to have been lost during the Spellhunt.",
-		"Alchemists have an empirical knowledge of magic, which they can not use directly but through focuses.",
-		"A focus is usually a gem which they can imbue with power to throw at their foes, exploding in fires, acid, ...",
-		"Alchemists are also known for their golem craft and are usually accompanied by such a construct which acts as a bodyguard.",
+		"An Alchemist is manipulator of materials using magic.",
+		"They do not use the forbidden arcane arts practised by the mages of old - such pervertors of nature using willpower alone have been shunned or actively hunted down since the Spellblaze.",
+		"Alchemists can transmute gems to bring forth elemental effects, turning them into balls of fire, torrents of acid, and other effects.  They can also reinforce armour with magical effects using gems, and channel arcane staffs to produce bolts of energy.",
+		"Though normally physically weak most alchemists are accompanied by magical golems which they construct and use as bodyguards.  These golems are enslaved to their master's will, and can grow in power as their master advances through the arts.",
 		"Their most important stats are: Magic and Dexterity",
 		"#GOLD#Stats modifiers:",
 		"#LIGHT_BLUE# * +0 Strength, +3 Dexterity, +0 Constitution",

game/modules/tome/data/talents/chronomancy/timetravel.lua

@@ -115,7 +115,7 @@ newTalent{
 		local terrain = game.level.map(game.player.x, game.player.y, engine.Map.TERRAIN)
 		local temporal_instability = mod.class.Object.new{
 			old_feat = game.level.map(target.x, target.y, engine.Map.TERRAIN),
-			name = "temporal instability",
+			name = "temporal instability", type="temporal", subtype="anomaly",
 			display = '&', color=colors.LIGHT_BLUE,
 			temporary = t.getDuration(self, t),
 			canAct = false,