luci: fix subscribe script typo

luci-app-passwall/Makefile

@@ -6,7 +6,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=luci-app-passwall
-PKG_VERSION:=4.69-3
+PKG_VERSION:=4.69-4
 PKG_RELEASE:=
 
 PKG_CONFIG_DEPENDS:= \

luci-app-passwall/root/usr/share/passwall/subscribe.lua

@@ -307,8 +307,10 @@ do
 				end
 			end
 		else
-			if v.currentNode == nil and v.delete then
-				v.delete()
+			if v.currentNode == nil then
+				if v.delete then
+					v.delete()
+				end
 				CONFIG[k] = nil
 			end
 		end
@@ -1037,7 +1039,7 @@ local function select_node(nodes, config)
 			config.set(config, server)
 		end
 	else
-		config.set(config, nil)
+		config.set(config, "nil")
 	end
 end