Merge branch 'fix_brawler_attack_speed' into 'master'

Fix Brawler Attack Speed

Currently, Empty Hand sets actor.combat.physspeed to 0.8 on learn, while gauntlets directly add to actor.combat.physspeed, which may not work as intended. For example:
If you start with brawler class and unlearn all unarmed talent, then you'll start the game with 1.0 combat.physspeed instead of 1.2(default speed for gauntlets). Afterwards, if you learn your first talent that grants Empty Hand while wearing heavy gauntlets, your combat.physspeed will be set to 0.8, and then you can switch to gloves to reduce combat.physspeed to 0.6(166% attack speed). 

See merge request !734

@@ -31,7 +31,9 @@ newTalent{
 		local fct = function()
 			self.before_empty_hands_combat = self.combat
 			self.combat = table.clone(self.combat, true)
-			self.combat.physspeed = math.min(0.8, self.combat.physspeed or 1000)
+			local lastspeed = self.combat.physspeed or 1
+			self.combat.physspeed = math.max(0.2, lastspeed - 0.2)
+			self.empty_hands_bonus = self.combat.physspeed - lastspeed
 			if not self.combat.sound then self.combat.sound = {"actions/punch%d", 1, 4} end
 			if not self.combat.sound_miss then self.combat.sound_miss = "actions/melee_miss" end
 		end
@@ -42,7 +44,9 @@ newTalent{
 		end
 	end,
 	on_unlearn = function(self, t)
-		self.combat = self.before_empty_hands_combat
+		self.combat.physspeed = (self.combat.physspeed or 0.8) - self.empty_hands_bonus
+		self.combat.sound = self.before_empty_hands_combat.sound
+		self.combat.sound_miss = self.before_empty_hands_combat.sound_miss
 	end,
 	getDamage = function(self, t) return self.level * 0.5 end,
 	info = function(self, t)