trying a new scaling method for saving in pnm

v4l2/grabvidseq.c

@@ -142,6 +142,7 @@ if (verbosity) {
 	fprintf(stderr, "running %s  pid=%d\n", argv[0], getpid());
 	fprintf(stderr, "period is %.3f milliseconds\n", period/1e3);
 	fprintf(stderr, "framesize is %dx%d\n", width, height);
+	fprintf(stderr, "upscaling is %s\n", upscaling ? "on" : "off");
 	}
 
 fd = v4l2_open(dev_name, O_RDWR | O_NONBLOCK, 0);
@@ -312,7 +313,7 @@ if (to_gray) {
 
 	// save cumul to file
 if (verbosity) fprintf(stderr, "saving to '%s'\n", outfile);
-foo = fimg_save_as_pnm(&cumul, outfile, 0);
+foo = fimg_save_as_pnm(&cumul, outfile, 1);
 
 	// free buffers
 fimg_destroy(&cumul);