change how the_bridge void works

the_bridge.lua

@@ -137,7 +137,9 @@ minetest.register_node("the_bridge:void", {
     diggable     = false,
     buildable_to = false,
     drop = "",
-    damage_per_second = 40,
+    on_walk_over=function(pos, node, player)
+        player:set_hp(0)
+    end,
 })
 
 minetest.register_tool("the_bridge:stonesword", {
@@ -169,4 +171,4 @@ minetest.register_craftitem("the_bridge:gapple",{
     on_secondary_use = gappleeat,
     description = S("Golden Apple"),
 	inventory_image = "default_apple.png^[colorize:#ead535",
-})
+})