Fix: prevent Nazgul from attacking undead hobbit types.

Author: k21971

doc/evilhack-changelog.md

@@ -3383,3 +3383,5 @@ The following changes to date are:
 - Fix: monster priests shouldn't wield edged weapons either
 - Fix: reactivate offhand weapon intrinsics when catching a returning weapon
 - Fix: samurai splint mails were not always rustproof
+- Fix: prevent Nazgul from attacking undead hobbit types
+

src/mon.c

@@ -2714,7 +2714,8 @@ struct monst *magr, *mdef;
         return ALLOW_M | ALLOW_TM;
 
     /* Nazgul vs hobbits */
-    if (ma == &mons[PM_NAZGUL] && racial_hobbit(mdef))
+    if (ma == &mons[PM_NAZGUL]
+        && (racial_hobbit(mdef) && !is_undead(md)))
         return ALLOW_M | ALLOW_TM;
 
     /* bees and honey badgers don't play nice */