Fix displaying item stats

As mentioned here: http://smf.cataclysmdda.com/index.php?topic=4593.0

Examining items on the ground and scrolling through inventory no longer displayed weapon stats.  This was caused by two things: 1) we stopped passing game into item::info, and 2) an additional check was made to see if game == NULL.

I took out the NULL check, which fixes the issue.  If those who have made contributions to this section of code have a better solution, please throw up a PR, otherwise please merge this one.  It is super annoying to play right now without seeing the item stats.