Fix is_ground_content settings for nodes

Remove line if set to the default of 'true'

mods/wool/init.lua

@@ -34,6 +34,7 @@ for _, row in ipairs(wool.dyes) do
 	minetest.register_node("wool:"..name, {
 		description = desc.." Wool",
 		tiles = {"wool_"..name..".png"},
+		is_ground_content = false,
 		groups = {snappy=2,choppy=2,oddly_breakable_by_hand=3,flammable=3,wool=1},
 		sounds = default.node_sound_defaults(),
 	})