minor fix

funcs/displacement.c

@@ -59,7 +59,7 @@ for (y=0; y<psrc->height; y++) {
 		fimg_get_rgb(psrc, x, y, rgb);
 
 		dispx = (float)x + (rgb[1]/dltg * 20.0);
-		dispy = (float)y + (rgb[2]/dltb * 10.0);
+		dispy = (float)y + (rgb[2]/dltb * 20.0);
 		dstx = (int)roundf(dispx - 10.0);
 		dsty = (int)roundf(dispy - 10.0);