util.datamanager: Import tostring and type (fix global access)

diff --git a/util/datamanager.lua b/util/datamanager.lua
index dc98bd13fd3bfd9a0dd0aa9f347dd181bc81a2c9..fb9ba3a4ce6283f6eb33abce53a218f692cc96c6 100644 (file)
--- a/util/datamanager.lua
+++ b/util/datamanager.lua
@@ -17,7 +17,9 @@ local io_open = io.open;
 local os_remove = os.remove;
 local os_rename = os.rename;
 local tonumber = tonumber;
+local tostring = tostring;
 local next = next;
+local type = type;
 local t_insert = table.insert;
 local t_concat = table.concat;
 local envloadfile = require"util.envload".envloadfile;