[Bug-XBoard] [bug #36228] reserved identifier violation

Update of bug #36228 (project xboard): Status:None = Ready For Test ___ Follow-up Comment #2: Changed this in master: renamed _ to XB_. I also made the include guards names more consistent,

[Bug-XBoard] [bug #36229] #define ⇒ enum?

Update of bug #36229 (project xboard): Status:None = Ready For Test ___ Follow-up Comment #1: Thanks for the suggestions. Changed STATE and PEN variables to enums.