--- ray/src/px/clrtab.c	1993/05/05 10:18:05	2.6
+++ ray/src/px/clrtab.c	1994/06/10 12:51:16	2.10
@@ -23,7 +23,7 @@ static char SCCSid[] = "$SunId$ LBL";
 #define part(cn)	((cn)>>2)
 #define prim(cn)	((cn)&3)
 				/* our color table (global) */
-BYTE	clrtab[256][3];
+extern BYTE	clrtab[256][3];
 				/* histogram of colors / color assignments */
 static unsigned	histo[NRED][NGRN][NBLU];
 #define cndx(c)		histo[((c)[RED]*NRED)>>8][((c)[GRN]*NGRN)>>8][((c)[BLU]*NBLU)>>8]
@@ -41,9 +41,11 @@ static int	CLRCUBE[3][2] = {0,NRED,0,NGRN,0,NBLU};
 #endif
 
 
-new_histo()		/* clear our histogram */
+new_histo(n)		/* clear our histogram */
+int	n;
 {
 	bzero((char *)histo, sizeof(histo));
+	return(0);
 }
 
 
@@ -77,6 +79,8 @@ int	ncolors;
 #ifdef CLOSEST
 	closest(ncolors);	/* ensure colors picked are closest */
 #endif
+				/* reset dithering function */
+	dith_colrs((BYTE *)NULL, (COLR *)NULL, 0);
 				/* return new color table size */
 	return(ncolors);
 }
@@ -107,16 +111,17 @@ register BYTE	*bs;
 register COLR	*cs;
 int	n;
 {
-	static short	(*cerr)[3];
+	static short	(*cerr)[3] = NULL;
 	static int	N = 0;
 	int	err[3], errp[3];
 	register int	x, i;
 
 	if (n != N) {		/* get error propogation array */
-		if (N)
-			cerr = (short (*)[3])realloc((char *)cerr,
-					3*n*sizeof(short));
-		else
+		if (N) {
+			free((char *)cerr);
+			cerr = NULL;
+		}
+		if (n)
 			cerr = (short (*)[3])malloc(3*n*sizeof(short));
 		if (cerr == NULL) {
 			N = 0;
@@ -238,7 +243,8 @@ int	p;
 register int	box[3][2];
 {
 	unsigned long	sum[3];
-	unsigned	r, g, n;
+	unsigned	r, g;
+	unsigned long	n;
 	register unsigned	b, c;
 						/* sum pixels in box */
 	n = 0;
@@ -254,7 +260,7 @@ register int	box[3][2];
 		    }
 		    histo[r][g][b] = p;		/* assign pixel */
 		}
-	if (n >= (1<<23)/HMAX) {		/* avoid overflow */
+	if (n >= (1L<<23)/HMAX) {		/* avoid overflow */
 		sum[RED] /= n;
 		sum[GRN] /= n;
 		sum[BLU] /= n;