let hd_mksh take from stdin, great simplification

dot.mkshrc

@@ -1,5 +1,5 @@
 # $Id$
-# $MirOS: src/bin/mksh/dot.mkshrc,v 1.117 2017/08/08 20:40:25 tg Exp $
+# $MirOS: src/bin/mksh/dot.mkshrc,v 1.118 2017/08/08 20:42:16 tg Exp $
 #-
 # Copyright (c) 2002, 2003, 2004, 2006, 2007, 2008, 2009, 2010,
 #		2011, 2012, 2013, 2014, 2015, 2016, 2017
@@ -99,7 +99,7 @@ elif \\builtin command -v hexdump >/dev/null; then
 	}
 else
 	function hd {
-		hd_mksh "$@"
+		\\builtin cat "$@" | hd_mksh "$@"
 	}
 fi
 
@@ -109,7 +109,6 @@ function hd_mksh {
 	\\builtin typeset dasc dn line i
 	\\builtin set +U
 
-	\\builtin cat "$@" | {
 	while \\builtin read -arn 512 line; do
 		\\builtin typeset -i1 'line[*]'
 		i=0
@@ -139,7 +138,6 @@ function hd_mksh {
 	done
 	(( hv == 2147483647 )) || \\builtin print -r -- "$dasc|"
 }
-}
 
 # Berkeley C shell compatible dirs, popd, and pushd functions
 # Z shell compatible chpwd() hook, used to update DIRSTACK[0]