shithub: hx

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make sure "off" is never negative

--- a/hx.c

+++ b/hx.c

@@ -135,8 +135,11 @@

 	if (sz >= 0) {

 		if (eof == 0 && lineoff > 0 && lineoff < 16) {

 			eof = 1;

-			if (lineoff == 8)

+			if (lineoff == 8) {

 				off--;

+				if (off < 0)

+					off = 0;

+			}

 			for (; lineoff < 16; lineoff++) {

 				line[lineoff] = 0;

 				s[off++] = ' ';