Minor Update v2.58

I just updated a small fix to version 2.58 correcting the following bug:

• The engine will no longer crash when an ordinary enemy performs a normal attack, with the message 'user.equips is not a function'.

This was an error introduced in v2.55 when I added support for locking main or offhand weapons when skills required a specific weapon type. A check was being made for for weapons in the hands of the battlers performing a normal attack without first checking to see if those battlers were enemies first, causing this crash.