Fixed 3 issues reported in MyBB Community

- Guests able to report comments, reported by Vanz - Fixed.
- A small glitch, that causes all reported comments to appear as if they were "On Guest's profile" in the comment center, reported by SAEED.M - Fixed.
- Problem in explode() function in the can_send_comments() method, I don't know how I didn't see that while coding, reported by SAEED.M - Fixed.