Fix leaf decay at borders of the active block area

mods/default/leafdecay.lua

@@ -38,7 +38,8 @@ minetest.register_abm({
 			if trunkp then
 				local n = minetest.env:get_node(trunkp)
 				local reg = minetest.registered_nodes[n.name]
-				if reg.groups.tree and reg.groups.tree ~= 0 then
+				-- Assume ignore is a trunk, to make the thing work at the border of the active area
+				if n.name == "ignore" or (reg.groups.tree and reg.groups.tree ~= 0) then
 					--print("cached trunk still exists")
 					return
 				end
@@ -57,7 +58,8 @@ minetest.register_abm({
 			}
 			local n = minetest.env:get_node(p)
 			local reg = minetest.registered_nodes[n.name]
-			if reg.groups.tree and reg.groups.tree ~= 0 then
+			-- Assume ignore is a trunk, to make the thing work at the border of the active area
+			if n.name == "ignore" or (reg.groups.tree and reg.groups.tree ~= 0) then
 				do_preserve = true
 				if default.leafdecay_enable_cache then
 					--print("caching trunk")