update the global variable pcrace when the player's race is changed
(RM-474 from redmine: created on 2012-11-25 by Marc Zinnschlag, , closed on 2012-12-04 by Marc Zinnschlag)
Edited by redmine
(RM-474 from redmine: created on 2012-11-25 by Marc Zinnschlag, , closed on 2012-12-04 by Marc Zinnschlag)