don't go reading random stack values

already e-mailed to upstream hpn devs

--- progressmeter.c
+++ progressmeter.c
@@ -183,7 +183,7 @@
 		percent = ((float)cur_pos / end_pos) * 100;
 	else
 		percent = 100;
-	snprintf(buf + strlen(buf), win_size - strlen(buf-8),
+	snprintf(buf + strlen(buf), win_size - strlen(buf) - 8,
 	    " %3d%% ", percent);
 
 	/* amount transferred */