Fix name error when equipping horse armor

mods/ENTITIES/mcl_minecarts/init.lua

@@ -409,14 +409,17 @@ local function register_entity(entity_id, mesh, textures, drop, on_rightclick, o
 
 			-- Slow down or speed up
 			local acc = dir.y * -1.8
-
+			local friction = 0.4
 			local speed_mod = minetest.registered_nodes[minetest.get_node(pos).name]._rail_acceleration
+
+			acc = acc - friction
+
 			if has_fuel then
-				acc = acc + 0.2
-			elseif speed_mod and speed_mod ~= 0 then
-				acc = acc + speed_mod
-			else
-				acc = acc - 0.4
+				acc = acc + 0.6
+			end
+
+			if speed_mod and speed_mod ~= 0 then
+				acc = acc + speed_mod + friction
 			end
 
 			new_acc = vector.multiply(dir, acc)

mods/ENTITIES/mobs_mc/horse.lua

@@ -253,6 +253,7 @@ local horse = {
 
 
 				-- Put on armor and take armor from player's inventory
+				local w = clicker:get_wielded_item()
 				local armor = minetest.get_item_group(iname, "horse_armor")
 				self._horse_armor = iname
 				if not minetest.settings:get_bool("creative_mode") then