Remove the 'nul' variable.

include/decl.h

@@ -196,7 +196,6 @@ E NEARDATA char horsename[];
 E char preferred_pet;
 E const char *occtxt;			/* defined when occupation != NULL */
 E const char *nomovemsg;
-E const char nul[];
 E char lock[];
 
 E const schar xdir[], ydir[], zdir[];

src/decl.c

@@ -52,7 +52,6 @@ NEARDATA struct kinfo killer = DUMMY;
 NEARDATA long done_money = 0;
 #endif
 const char *nomovemsg = 0;
-const char nul[40] = DUMMY;			/* contains zeros */
 NEARDATA char plname[PL_NSIZ] = DUMMY;		/* player name */
 NEARDATA char pl_character[PL_CSIZ] = DUMMY;
 NEARDATA char pl_race = '\0';

src/dig.c

@@ -1855,7 +1855,7 @@ long timeout;	/* unused */
 		char *cname = corpse_xname(obj, (const char *)0, CXN_NO_PFX);
 
 		Your("%s%s %s away%c",
-		     obj == uwep ? "wielded " : nul, cname,
+		     obj == uwep ? "wielded " : "", cname,
 		     otense(obj, "rot"), obj == uwep ? '!' : '.');
 	    }
 	    if (obj == uwep) {

src/eat.c

@@ -691,7 +691,7 @@ register int pm;
 		if (!Slimed && !Unchanging && !slimeproof(youmonst.data)) {
 		    You("don't feel very well.");
 		    make_slimed(10L, (char*) 0);
-		    delayed_killer(SLIMED, KILLED_BY_AN, nul);
+		    delayed_killer(SLIMED, KILLED_BY_AN, "");
 		}
 		/* Fall through */
 	    default:

src/hack.c

@@ -207,7 +207,7 @@ moverock()
 			pline("%s%s and %s a %s in the %s!",
 			  Tobjnam(otmp,
 			   (ttmp->ttyp == TRAPDOOR) ? "trigger" : "fall"),
-			  (ttmp->ttyp == TRAPDOOR) ? nul : " into",
+			  (ttmp->ttyp == TRAPDOOR) ? "" : " into",
 			  otense(otmp, "plug"),
 			  (ttmp->ttyp == TRAPDOOR) ? "trap door" : "hole",
 			  surface(rx, ry));

src/mthrowu.c

@@ -412,7 +412,7 @@ struct obj *obj;		/* missile (or stack providing it) */
 			if (!Stoned && !Stone_resistance
 			    && !(poly_when_stoned(youmonst.data) &&
 				 polymon(PM_STONE_GOLEM))) {
-			    make_stoned(5L, (char *)0, KILLED_BY, nul);
+			    make_stoned(5L, (char *)0, KILLED_BY, "");
 			}
 		    }
 		    stop_occupation();

src/read.c

@@ -228,7 +228,7 @@ register const char *color;
 	pline("%s%s%s for a moment.",
 		Yobjnam2(otmp, Blind ? "vibrate" : "glow"),
 		Blind ? "" : " ",
-		Blind ? nul : hcolor(color));
+		Blind ? "" : hcolor(color));
 }
 
 /* Is the object chargeable?  For purposes of inventory display; it is */
@@ -806,8 +806,8 @@ struct obj *sobj; /* scroll, or fake spellbook object for scroll-like spell */
 			pline("%s violently %s%s%s for a while, then %s.",
 			      Yname2(otmp),
 			      otense(otmp, Blind ? "vibrate" : "glow"),
-			      (!Blind && !same_color) ? " " : nul,
+			      (!Blind && !same_color) ? " " : "",
-			      (Blind || same_color) ? nul :
+			      (Blind || same_color) ? "" :
 				hcolor(scursed ? NH_BLACK : NH_SILVER),
 			      otense(otmp, "evaporate"));
 			remove_worn_item(otmp, FALSE);
@@ -836,10 +836,10 @@ struct obj *sobj; /* scroll, or fake spellbook object for scroll-like spell */
 		}
 		pline("%s %s%s%s%s for a %s.",
 		      Yname2(otmp),
-		      s == 0 ? "violently " : nul,
+		      s == 0 ? "violently " : "",
 		      otense(otmp, Blind ? "vibrate" : "glow"),
-		      (!Blind && !same_color) ? " " : nul,
+		      (!Blind && !same_color) ? " " : "",
-		      (Blind || same_color) ? nul :
+		      (Blind || same_color) ? "" :
 			  hcolor(scursed ? NH_BLACK : NH_SILVER),
 		      (s * s > 1) ? "while" : "moment");
 		/* [this cost handling will need updating if shop pricing is
@@ -914,11 +914,11 @@ struct obj *sobj; /* scroll, or fake spellbook object for scroll-like spell */
 			Your("%s begin to %s%s.",
 			    makeplural(body_part(HAND)),
 			    Blind ? "tingle" : "glow ",
-			    Blind ? nul : hcolor(NH_PURPLE));
+			    Blind ? "" : hcolor(NH_PURPLE));
 			make_confused(HConfusion + rnd(100),FALSE);
 		    } else {
 			pline("A %s%s surrounds your %s.",
-			    Blind ? nul : hcolor(NH_RED),
+			    Blind ? "" : hcolor(NH_RED),
 			    Blind ? "faint buzz" : " glow",
 			    body_part(HEAD));
 			make_confused(0L,TRUE);

src/save.c

@@ -73,11 +73,7 @@ static struct save_procs {
 #endif
 };
 
-#ifdef GCC_WARN
+static long nulls[sizeof(struct trap) + sizeof(struct fruit)];
-static long nulls[10];
-#else
-#define nulls nul
-#endif
 
 #if defined(UNIX) || defined(VMS) || defined(__EMX__) || defined(WIN32)
 #define HUP	if (!program_state.done_hup)