Fix electric tools breaking

Fixes #13

tools/electric_chainsaw.lua

@@ -31,6 +31,10 @@ local function registerElectricChainsaw(config)
 	local definition={
 		description=config.displayName,
 		inventory_image="industrialtest_"..config.name..".png",
+		after_use=function(itemstack)
+			-- Hack to make sure that chainsaw won't be destroyed when has 0 EU
+			return nil
+		end,
 		_industrialtest_powerStorage=true,
 		_industrialtest_powerCapacity=10000,
 		_industrialtest_powerFlow=industrialtest.api.lvPowerFlow,
@@ -70,10 +74,6 @@ local function registerElectricChainsaw(config)
 			end
 			return nil
 		end
-		definition.after_use=function(itemstack)
-			-- Hack to make sure that chainsaw won't be destroyed when has 0 EU in MCL
-			return nil
-		end
 		definition._mcl_diggroups={
 			axey={
 				speed=config.inactiveDigSpeed,

tools/electric_drill.lua

@@ -31,6 +31,10 @@ local function registerElectricDrill(config)
 	local definition={
 		description=config.displayName,
 		inventory_image="industrialtest_"..config.name..".png",
+		after_use=function()
+			-- Hack to make sure that drill won't be destroyed when has 0 EU
+			return nil
+		end,
 		_industrialtest_powerStorage=true,
 		_industrialtest_powerCapacity=10000,
 		_industrialtest_powerFlow=industrialtest.api.lvPowerFlow,
@@ -64,10 +68,6 @@ local function registerElectricDrill(config)
 			tool=1,
 			dig_speed_class=config.digSpeedClass
 		}
-		definition.after_use=function()
-			-- Hack to make sure that drill won't be destroyed when has 0 EU in MCL
-			return nil
-		end
 		definition._mcl_diggroups={
 			pickaxey={
 				speed=config.inactiveDigSpeed,

tools/electric_saber.lua

@@ -31,6 +31,10 @@ local function registerElectricSaber(config)
 	local definition={
 		description=config.displayName,
 		inventory_image="industrialtest_"..config.name..".png",
+		after_use=function()
+			-- Hack to make sure that saber won't be destroyed when has 0 EU
+			return nil
+		end,
 		_industrialtest_powerStorage=true,
 		_industrialtest_powerCapacity=10000,
 		_industrialtest_powerFlow=industrialtest.api.lvPowerFlow,
@@ -62,10 +66,6 @@ local function registerElectricSaber(config)
 			max_drop_level=config.maxDropLevel,
 			damage_groups={fleshy=config.inactiveDamage}
 		}
-		definition.after_use=function()
-			-- Hack to make sure that saber won't be destroyed when has 0 EU in MCL
-			return nil
-		end
 		definition._mcl_toollike_wield=true
 		definition._mcl_diggroups={
 			swordy={