remove protectors on area removal

mod_areas.lua

@@ -15,8 +15,28 @@ function creative_regions:get_areas_area_size(areas_area)
 	return x*z
 end
 
--- areas mod hud
 if minetest.get_modpath("areas") then
+
+-- remove protector blocks on area removal
+	areas:registerOnRemove(function(id)
+		local area = areas.areas[id]
+		local area_id = "a"..tostring(id)
+		local protectors_in_area = minetest.find_nodes_in_area(area.pos1, area.pos2, {"creative_regions:"})
+		for pos in ipairs(protectors_in_area) do
+			local meta = minetest.get_meta(pos)
+			local stored_id = meta:get_string("area_id")
+			local privstring = meta:get_string("privstring")
+			local owner = meta:get_string("owner")
+			creative_regions.set_region_privs(area_id, nil)
+			creative_regions.save_regions()
+			if stored_id == area_id and privstring == creative_regions.region_privs[tostring(area_id)] then
+				minetest.remove_node(pos)
+				minetest.chat_send_player(owner, "[creative_regions] "..description.." removed for removed area " .. area_id)
+			end
+		end
+	end)
+
+-- areas mod hud
 	local function areas_hud_handler(pos, areas)
 		local current_regions = creative_regions.astore:get_areas_for_pos(pos, false, true)
 		for astore_id, astore_area in pairs( current_regions ) do
@@ -31,4 +51,5 @@ if minetest.get_modpath("areas") then
 	end
 
 	areas:registerHudHandler(areas_hud_handler)
+
 end