fix: add missing tostring() call

Author: jjangsangy

script/locale-loader.lua

@@ -2,26 +2,27 @@ local function mergeKey(key, k)
     if not key then
         return k
     end
-    if k:sub(1, 1):match '%w' then
-        return key .. '.' .. k
+    k = tostring(k)
+    if k:sub(1, 1):match("%w") then
+        return key .. "." .. k
     else
         return key .. k
     end
 end
 
 local function proxy(results, key)
     return setmetatable({}, {
-        __index = function (_, k)
+        __index = function(_, k)
             return proxy(results, mergeKey(key, k))
         end,
-        __newindex = function (_, k, v)
+        __newindex = function(_, k, v)
             results[mergeKey(key, k)] = v
-        end
+        end,
     })
 end
 
-return function (text, path, results)
+return function(text, path, results)
     results = results or {}
-    assert(load(text, '@' .. path, "t", proxy(results)))()
+    assert(load(text, "@" .. path, "t", proxy(results)))()
     return results
 end