This one was posted by Dylan O'Donnell to RGRN some time back.  Given its
simplicity, no doubt many people have independently made the same changes.

-- Jason Short


--- src/artifact.c.old  Sun Jul 23 16:00:15 2000
+++ src/artifact.c      Sun Aug 13 13:40:04 2000
@@ -60,7 +60,7 @@
 
        /* Excalibur can be used by any lawful character, not just knights */
        if (!Role_if(PM_KNIGHT))
-           artilist[ART_EXCALIBUR].role = 0;           /****FIXME****/
+           artilist[ART_EXCALIBUR].role = NON_PM;      /****FIXME****/
 
        /* Fix up the quest artifact */
        if (urole.questarti) {