bug: results for show and ask posts with no link should link to the post itself

[danielsgriffin]

ShowHN posts do not require URLs in the link. If an item does not have a link then the search results include the link to the search itself, rather than either (1) linking to the post or (2) not having a link at all.
It doesn't do anything if left clicked, but right clicking opens the search again in another tab. This disrupts a practice of opening tabs to read while reading through search results because the user may not remember which result they were trying to look at.

Example query: [Show HN: Search engine to quickly find in-depth articles from engineering blogs]

Notice the top result.

Example posts:
without link: https://news.ycombinator.com/item?id=25763329

with link: https://news.ycombinator.com/item?id=40112958