shithub: riscv

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jpg: fd == 0 is valid, so don't ignore it

--- a/sys/src/cmd/jpg/jpg.c

+++ b/sys/src/cmd/jpg/jpg.c

@@ -125,7 +125,7 @@

 	if(yflag==0 && dflag==0 && colorspace==CYCbCr){	/* see if we should convert right to RGB */

 		fd = open("/dev/screen", OREAD);

-		if(fd > 0){

+		if(fd >= 0){

 			buf[12] = '\0';

 			if(read(fd, buf, 12)==12 && chantodepth(strtochan(buf))>8)

 				colorspace = CRGB;