ta1 hammer and power_available bugs fixed

iron_age/hammer.lua

@@ -156,6 +156,7 @@ if minetest.global_exists("wielded_light") then
 			damage_groups = {fleshy=4},
 		},
 		sound = {breaks = "default_tool_breaks"},
+		light_source = 12,
 		after_use = function(itemstack, user, node, digparams)
 			minetest.after(0.01, handler, user:get_player_name(), node)
 			itemstack:add_wear(digparams.wear)

power/node_api.lua

@@ -144,7 +144,8 @@ function techage.power.power_available(pos, Cable)
 	local nvm = techage.get_nvm(pos)
 	local tlib_type = Cable.tube_type
 	local netID = nvm[Cable.tube_type] and nvm[Cable.tube_type]["netID"]
-	return networks.has_network(tlib_type, netID)
+	local netw = networks.has_network(tlib_type, netID)
+	return netw and netw.on and netw.alive and netw.alive > 0
 end
 
 -- this is more a try to start, the start will be performed by on_power()