--- ray/src/px/pfilt.c	1990/01/09 17:58:35	1.9
+++ ray/src/px/pfilt.c	1990/09/13 09:46:00	1.10
@@ -326,6 +326,12 @@ FILE  *in;
 			quit(1);
 		}
 	}
+					/* skip leftovers */
+	while (yread < yres) {
+		if (freadscan(scanin[0], xres, in) < 0)
+			break;
+		yread++;
+	}
 }