src/ldebug.js: Fix incorrect error messages

Previously could get odd things, e.g. `1-nil` would throw:
> attempt to perform arithmetic on a number value

1 files changed, 1 insertions, 1 deletions

diff --git a/tests/ldebug.js b/tests/ldebug.js
index ba5c966..fe6e83d 100644
--- a/tests/ldebug.js
+++ b/tests/ldebug.js
@@ -175,7 +175,7 @@ test('luaG_opinterror', function (t) {
     }, "JS Lua program ran without error");
 
     t.ok(
-        lua.lua_tojsstring(L, -1).endsWith("attempt to perform arithmetic on a string value"),
+        lua.lua_tojsstring(L, -1).endsWith("attempt to perform arithmetic on a table value"),
         "Correct error was thrown"
     );
 });