fix #H184 - rndmonnum plan B

     From a bug report, the fallback selection criteria
(used when everything is extinct?) in rndmonnum() was excluding hell-only
monsters when outside of Gehennom, but failed to exclude never-in-hell ones
when inside.  [Some of the never-in-hell monsters are Angels, but the rest
are all cold based creatures.  That must date to when fire resistance was
required for the hero, which is no longer the case.  Should those cold
monsters retain their never-in-hell setting?]

     This also fixes a latent copy/paste bug in the unused mons[] definition
of Cerberus (it was the only unique monster which failed to specify G_NOGEN).

doc/fixes34.4

@@ -249,6 +249,8 @@ fix phrasing in monster against monster attack feedback when attacker is
 don't place hero on top of monster when arriving on level which is so full
 	that the monster can't be moved out of the way
 have to see a divine gift in order to have it become a discovery
+honor the never-in-hell flag when selecting random monster type for corpses,
+	eggs, figurines, and statues created in Gehennom
 
 
 Platform- and/or Interface-Specific Fixes

src/mkobj.c

@@ -1,4 +1,4 @@
-/*	SCCS Id: @(#)mkobj.c	3.5	2006/07/08	*/
+/*	SCCS Id: @(#)mkobj.c	3.5	2006/08/23	*/
 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
 /* NetHack may be freely redistributed.  See license for details. */
 
@@ -308,16 +308,18 @@ rndmonnum()	/* select a random, common monster type */
 {
 	register struct permonst *ptr;
 	register int	i;
+	unsigned short excludeflags;
 
 	/* Plan A: get a level-appropriate common monster */
 	ptr = rndmonst();
 	if (ptr) return(monsndx(ptr));
 
 	/* Plan B: get any common monster */
+	excludeflags = G_UNIQ | G_NOGEN | (Inhell ? G_NOHELL : G_HELL);
 	do {
 	    i = rn1(SPECIAL_PM - LOW_PM, LOW_PM);
 	    ptr = &mons[i];
-	} while((ptr->geno & G_NOGEN) || (!Inhell && (ptr->geno & G_HELL)));
+	} while ((ptr->geno & excludeflags) != 0);
 
 	return(i);
 }

src/monst.c

@@ -297,7 +297,7 @@ NEARDATA struct permonst mons[] = {
 	M3_INFRAVISIBLE, CLR_RED),
 #ifdef CHARON
     MON("Cerberus", S_DOG,
-	LVL(12, 10, 2, 20, -7), (G_HELL|G_UNIQ|1),
+	LVL(12, 10, 2, 20, -7), (G_NOGEN|G_UNIQ|G_HELL),
 	A(ATTK(AT_BITE, AD_PHYS, 3, 6), ATTK(AT_BITE, AD_PHYS, 3, 6),
 	  ATTK(AT_BITE, AD_PHYS, 3, 6), NO_ATTK, NO_ATTK, NO_ATTK),
 	SIZ(1000, 350, MS_BARK, MZ_LARGE), MR_FIRE, MR_FIRE,