--- ray/src/px/x11image.c	1990/10/21 10:48:17	1.10
+++ ray/src/px/x11image.c	1990/12/21 17:20:11	1.12
@@ -240,7 +240,8 @@ init()			/* get data and open window */
 	if (geometry != NULL) {
 		bzero((char *)&oursizhints, sizeof(oursizhints));
 		i = XParseGeometry(geometry, &oursizhints.x, &oursizhints.y,
-				&oursizhints.width, &oursizhints.height);
+				(unsigned *)&oursizhints.width,
+				(unsigned *)&oursizhints.height);
 		if ((i&(WidthValue|HeightValue)) == (WidthValue|HeightValue))
 			oursizhints.flags |= USSize;
 		else {
@@ -734,7 +735,7 @@ colormap  map;
 	register int  i, val;
 
 	for (i = 0; i < 256; i++) {
-		val = pow(i/256.0, 1.0/gamcor) * 256.0;
+		val = pow((i+0.5)/256.0, 1.0/gamcor) * 256.0;
 		map[0][i] = map[1][i] = map[2][i] = val;
 	}
 }