check version in init.lua within directory plugins

data/core/init.lua

@@ -601,7 +601,9 @@ end
 local function check_plugin_version(filename)
   local info = system.get_file_info(filename)
   if info ~= nil and info.type == "dir" then
-    return true
+    filename = filename .. "/init.lua"
+    info = system.get_file_info(filename)
+    if not info then return true end
   end
   local f = io.open(filename, "r")
   if not f then return false end