Another fix for #K4317 - monster grudge

Undead monsters created by the level creation routine do not grudge
other (zombifiable) monsters created during the level creation.

This of course doesn't prevent the grudge happening with monsters
created during gameplay.

Invalidates saves and bones.

include/monst.h

@@ -163,7 +163,8 @@ struct monst {
 
     Bitfield(mspotted, 1);  /* mon is currently seen by hero */
     Bitfield(mwandexp, 1);  /* mon has experience with wands */
-    /* 6 spare bits */
+    Bitfield(mgenmklev, 1); /* made by the level generation */
+    /* 5 spare bits */
 
     unsigned long mstrategy; /* for monsters with mflag3: current strategy */
 #ifdef NHSTDC

include/patchlevel.h

@@ -17,7 +17,7 @@
  * Incrementing EDITLEVEL can be used to force invalidation of old bones
  * and save files.
  */
-#define EDITLEVEL 134
+#define EDITLEVEL 135
 
 /*
  * Development status possibilities.

src/makemon.c

@@ -1295,6 +1295,7 @@ makemon(
 
     place_monster(mtmp, x, y);
     mtmp->mcansee = mtmp->mcanmove = TRUE;
+    mtmp->mgenmklev = gi.in_mklev;
     mtmp->seen_resistance = M_SEEN_NOTHING;
     mtmp->mpeaceful = (mmflags & MM_ANGRY) ? FALSE : peace_minded(ptr);
     if ((mmflags & MM_MINVIS) != 0) /* for ^G */

src/mon.c

@@ -2391,6 +2391,8 @@ mm_2way_aggression(struct monst *magr, struct monst *mdef)
        them waking up early (e.g. because a zombie decided to attack the
        Wizard of Yendor). */
     if (zombie_maker(magr) && zombie_form(mdef->data) != NON_PM) {
+        if (magr->mgenmklev && mdef->mgenmklev)
+            return 0L;
         if (!Is_stronghold(&u.uz)
             && !unique_corpstat(magr->data) && !unique_corpstat(mdef->data))
             return (ALLOW_M | ALLOW_TM);