Lint cleanup, nothing significant.

There is one more new complaint that might cause problems:
explode.c(545): warning: conversion from long may lose accuracy

src/files.c

@@ -293,6 +293,7 @@ int whichprefix, buffnum;
 }
 
 /* reasonbuf must be at least BUFSZ, supplied by caller */
+/*ARGSUSED*/
 int
 validate_prefix_locations(reasonbuf)
 char *reasonbuf;
@@ -923,6 +924,7 @@ restore_saved_game()
 	return fd;
 }
 
+/*ARGSUSED*/
 static char*
 plname_from_file(filename)
 const char* filename;
@@ -1014,8 +1016,8 @@ char** saved;
 {
     if ( saved ) {
 	int i=0;
-	while (saved[i]) free(saved[i++]);
-	free(saved);
+	while (saved[i]) free((genericptr_t)saved[i++]);
+	free((genericptr_t)saved);
     }
 }
 

src/hack.c

@@ -805,7 +805,7 @@ boolean guess;
 		u.dy = sgn(u.ty - u.uy);
 		if (test_move(u.ux, u.uy, u.dx, u.dy, TEST_MOVE))
 		    return TRUE;
-		goto done;
+		goto found;
 	    }
 	    tx = px;
 	    ty = py;
@@ -819,7 +819,7 @@ boolean guess;
 	return FALSE;
     }
 
-done:
+found:
     u.dx = 0;
     u.dy = 0;
     nomul(0);

src/mhitm.c

@@ -577,7 +577,7 @@ mdamagem(magr, mdef, mattk)
 	boolean cancelled;
 
 	if (touch_petrifies(pd) && !resists_ston(magr)) {
-	    long protector = attk_protection(mattk->aatyp),
+	    long protector = attk_protection((int)mattk->aatyp),
 		 wornitems = magr->misc_worn_check;
 
 	    /* wielded weapon gives same protection as gloves here */

src/mhitu.c

@@ -2434,7 +2434,7 @@ register struct attack *mattk;
 		goto assess_dmg;
 	    case AD_STON: /* cockatrice */
 	    {
-		long protector = attk_protection(mattk->aatyp),
+		long protector = attk_protection((int)mattk->aatyp),
 		     wornitems = mtmp->misc_worn_check;
 
 		/* wielded weapon gives same protection as gloves here */

src/muse.c

@@ -1153,7 +1153,7 @@ register struct obj *otmp;
 		break;
 	case WAN_CANCELLATION:
 	case SPE_CANCELLATION:
-		cancel_monst(mtmp, otmp, FALSE, TRUE, FALSE);
+		(void) cancel_monst(mtmp, otmp, FALSE, TRUE, FALSE);
 		break;
 	}
 	if (reveal_invis) {

src/pray.c

@@ -353,6 +353,7 @@ register int trouble;
 		    else if (Cursed_obj(uarmf, FUMBLE_BOOTS))
 			otmp = uarmf;
 		    goto decurse;
+		    /*NOTREACHED*/
 		    break;
 	    case TROUBLE_CURSED_ITEMS:
 		    otmp = worst_cursed_item();

src/uhitm.c

@@ -711,6 +711,7 @@ int thrown;
 			        shk_your(yourbuf, obj));
 			useup(obj);
 			return(TRUE);
+			/*NOTREACHED*/
 			break;
 #endif
 		    case CORPSE:		/* fixed by polder@cs.vu.nl */
@@ -2138,7 +2139,7 @@ uchar aatyp;
 	    break;
 	  case AD_STON:
 	    if (mhit) {		/* successful attack */
-		long protector = attk_protection(aatyp);
+		long protector = attk_protection((int)aatyp);
 
 		/* hero using monsters' AT_MAGC attack is hitting hand to
 		   hand rather than casting a spell */