Silence GCC warnings

...when compiling with -Wall --pedantic

src/cmd.c

@@ -997,11 +997,8 @@ wiz_levltyp_legend(VOID_ARGS)
 STATIC_PTR int
 wiz_smell(VOID_ARGS)
 {
-	char	out_str[BUFSZ];
-	struct permonst *pm = 0;
 	int     ans = 0;
 	int     mndx;		/* monster index */
-	int	found;		/* count of matching mndxs found */
 	coord   cc;		/* screen pos of unknown glyph */
 	int glyph;		/* glyph at selected position */
 
@@ -1015,11 +1012,6 @@ wiz_smell(VOID_ARGS)
 
 	pline("You can move the cursor to a monster that you want to smell.");
 	do {
-		/* Reset some variables. */
-		pm = (struct permonst *)0;
-		found = 0;
-		out_str[0] = '\0';
-	
 		pline("Pick a monster to smell.");
 		ans = getpos(&cc, TRUE, "a monster");
 		if (ans < 0 || cc.x < 0) {

src/dig.c

@@ -1284,7 +1284,7 @@ zap_dig()
 	struct monst *mtmp;
 	struct obj *otmp;
 	struct trap *trap_with_u = (struct trap *)0;
-	int zx, zy, diridx, digdepth, flow_x, flow_y;
+	int zx, zy, diridx = 8, digdepth, flow_x = -1, flow_y = -1;
 	boolean shopdoor, shopwall, maze_dig, pitdig = FALSE, pitflow = FALSE;
 
 	/*
@@ -1462,7 +1462,7 @@ zap_dig()
 	} /* while */
 	tmp_at(DISP_END,0);	/* closing call */
 
-	if (pitflow) {
+	if (pitflow && isok(flow_x, flow_y)) {
 		struct trap *ttmp  = t_at(flow_x, flow_y);
 		if (ttmp && (ttmp->ttyp == PIT || ttmp->ttyp == SPIKED_PIT)) {
 			schar filltyp = fillholetyp(ttmp->tx, ttmp->ty, TRUE);

src/dog.c

@@ -423,7 +423,7 @@ boolean with_you;
 		 * probably because the level is full.
 		 * Dump the monster's cargo and leave the monster dead.
 		 */
-	    	struct obj *obj, *corpse;
+	    	struct obj *obj;
 		while ((obj = mtmp->minvent) != 0) {
 		    obj_extract_self(obj);
 		    obj_no_longer_held(obj);
@@ -437,7 +437,7 @@ boolean with_you;
 			    impossible("Can't find relocated object.");
 		    }
 		}
-		corpse = mkcorpstat(CORPSE, (struct monst *)0, mtmp->data,
+		(void) mkcorpstat(CORPSE, (struct monst *)0, mtmp->data,
 				xlocale, ylocale, CORPSTAT_NONE);
 		mongone(mtmp);
 	    }

src/mkroom.c

@@ -219,14 +219,10 @@ struct mkroom *sroom;
 {
 	struct monst *mon;
 	register int sx,sy,i;
-	int sh, tx, ty, goldlim, type = sroom->rtype;
+	int sh, tx = 0, ty = 0, goldlim = 0, type = sroom->rtype;
 	int rmno = (int)((sroom - rooms) + ROOMOFFSET);
 	coord mm;
 
-#ifdef GCC_WARN
-	tx = ty = goldlim = 0;
-#endif
-
 	sh = sroom->fdoor;
 	switch(type) {
 	    case COURT:

src/potion.c

@@ -1055,7 +1055,7 @@ boolean useeit;
 const char *objphrase;	/* "Your widget glows" or "Steed's saddle glows" */
 {
     void FDECL((*func), (OBJ_P)) = 0;
-    const char *how = 0, *glowcolor = 0;
+    const char *glowcolor = 0;
 #define COST_alter (-2)
 #define COST_none  (-1)
     int costchange = COST_none;
@@ -1064,7 +1064,6 @@ const char *objphrase;	/* "Your widget glows" or "Steed's saddle glows" */
     if (!potion || potion->otyp != POT_WATER) return FALSE;
 
     if (potion->blessed) {
-	how = "softly glow";
 	if (targobj->cursed) {
 	    func = uncurse;
 	    glowcolor = NH_AMBER;
@@ -1076,7 +1075,6 @@ const char *objphrase;	/* "Your widget glows" or "Steed's saddle glows" */
 	    altfmt = TRUE;	/* "with a <color> aura" */
 	}
     } else if (potion->cursed) {
-	how = "glow";
 	if (targobj->blessed) {
 	    func = unbless;
 	    glowcolor = "brown";

src/read.c

@@ -2198,7 +2198,7 @@ create_particular()
 {
 	char buf[BUFSZ], *bufp, monclass;
 	int which, tryct, i, firstchoice = NON_PM;
-	struct permonst *whichpm;
+	struct permonst *whichpm = NULL;
 	struct monst *mtmp;
 	boolean madeany = FALSE;
 	boolean maketame, makepeaceful, makehostile;

src/restore.c

@@ -1144,9 +1144,9 @@ get_plname_from_file(fd, plbuf)
 int fd;
 char *plbuf;
 {
-	int rlen, pltmpsiz = 0;
+	int pltmpsiz = 0;
-	rlen = read(fd, (genericptr_t) &pltmpsiz, sizeof(pltmpsiz));
+	(void) read(fd, (genericptr_t) &pltmpsiz, sizeof(pltmpsiz));
-	rlen = read(fd, (genericptr_t) plbuf, pltmpsiz);
+	(void) read(fd, (genericptr_t) plbuf, pltmpsiz);
 	return;
 }
 

src/trap.c

@@ -1406,13 +1406,12 @@ struct obj *otmp;
 {
 	struct monst *steed = u.usteed;
 	int tt;
-	boolean in_sight, trapkilled, steedhit;
+	boolean trapkilled, steedhit;
 
 	if (!steed || !trap) return 0;
 	tt = trap->ttyp;
 	steed->mx = u.ux;
 	steed->my = u.uy;
-	in_sight = !Blind;
 	trapkilled = steedhit = FALSE;
 
 	switch (tt) {
@@ -4266,7 +4265,7 @@ boolean trapdoor_only;
 boolean *noticed;	/* set to true iff hero notices the effect; */
 {			/* otherwise left with its previous value intact */
     struct trap *t;
-    boolean ishero = (mon == &youmonst), result;
+    boolean ishero = (mon == &youmonst);
 
     if (mon == u.usteed) ishero = TRUE;
     t = t_at(ishero ? u.ux : mon->mx, ishero ? u.uy : mon->my);
@@ -4281,7 +4280,6 @@ boolean *noticed;	/* set to true iff hero notices the effect; */
 	if (u.utrap) return FALSE;	/* already trapped */
 	*noticed = TRUE;
 	dotrap(t, FORCETRAP);
-	result = (u.utrap != 0);
     } else {
 	if (mon->mtrapped) return FALSE;	/* already trapped */
 	/* you notice it if you see the trap close/tremble/whatever
@@ -4290,7 +4288,6 @@ boolean *noticed;	/* set to true iff hero notices the effect; */
 	/* monster will be angered; mintrap doesn't handle that */
 	wakeup(mon);
 	++force_mintrap;
-	result = (mintrap(mon) != 0);
 	--force_mintrap;
 	/* mon might now be on the migrating monsters list */
     }