Possible unknown bug

I am maintaining/upgrading a Drupal 6 website which was originally build by another developer/site builder.

I came across some notes/comments made by previous developer and I was unsure if it was manual bug fix or if the original intent was to customize the website. I am not a developer/coder, so I am unsure if this is a bug. However, I am reporting in case it is a "rare" bug which no one knew about.

Below are the exact comments made by previous developer:

Modification of modules/token/token_actions.module (function token_normalize_context)

Added if statement to existing set of if statements so that user tokens are replaced correctly by the token module (for example, in triggered actions):

if (empty($context['node']) && !empty($context['comment']) && !empty($context['comment']->nid)) {
   $context['node'] = node_load($context['comment']->nid);
}