--- ray/src/px/pfilt.c	1990/01/09 17:58:35	1.9
+++ ray/src/px/pfilt.c	1990/10/16 13:52:44	1.11
@@ -281,6 +281,7 @@ FILE  *in;
 			fprintf(stderr, "%s: warning - partial frame (%d%%)\n",
 					progname, 100*i/yres);
 			yres = i;
+			y_r = (double)nrows/yres;
 			break;
 		}
 		pass1scan(scan, i);
@@ -325,6 +326,12 @@ FILE  *in;
 			fprintf(stderr, "%s: write error in pass2\n", progname);
 			quit(1);
 		}
+	}
+					/* skip leftovers */
+	while (yread < yres) {
+		if (freadscan(scanin[0], xres, in) < 0)
+			break;
+		yread++;
 	}
 }