Fix plugin version check

data/core/init.lua

@@ -687,7 +687,8 @@ function core.load_plugins()
 
   for filename, plugin_dir in pairs(files) do
     local basename = filename:match("(.-)%.lua$") or filename
-    local version_match = check_plugin_version(plugin_dir .. '/' .. filename)
+    local is_lua_file, version_match = check_plugin_version(plugin_dir .. '/' .. filename)
+    if is_lua_file then
       if not version_match then
         core.log_quiet("Version mismatch for plugin %q from %s", basename, plugin_dir)
         local list = refused_list[plugin_dir:find(USERDIR) == 1 and 'userdir' or 'datadir'].plugins
@@ -701,6 +702,7 @@ function core.load_plugins()
         end
       end
     end
+  end
   return no_errors, refused_list
 end