Mechanic puzzled at i45 inspection

[ezziejay]

I had a used 2010 Hyundai i45 Elite MY11 Automatic inspected before I purchased it and the mechanics were puzzled at this finding. There was what appears to be a small puncture hole in the engine cylinder near the oil cap. They said they had never seen it before and had no clue as to whether it was a problem.

Here are the photos:

http://i.imgur.com/rjpJ8Rp.png

http://i.imgur.com/S9RDTuI.png

So I'm asking you guys...Is this something that all i45s have or is it cause to not purchase the car?