[Minor] Fix vector invocation of elt transformer

diff --git a/lualib/lua_selectors.lua b/lualib/lua_selectors.lua
index 960d15a24637cefb27b83da872cb2db31b2a8d55..4d0e7a2ecc7ff66bc9c58249413e25be93af27ce 100644 (file)
--- a/lualib/lua_selectors.lua
+++ b/lualib/lua_selectors.lua
@@ -332,8 +332,9 @@ local transform_function = {
   -- Extracts table value from key-value list
   ['elt'] = {
     ['types'] = {
-      ['kv_list'] = true,
+      ['kv'] = true,
     },
+    ['map_type'] = 'string',
     ['process'] = function(inp, t, args)
       return inp[args[1]],'string'
     end