gitweb: fix error in sanitize when highlight is enabled

$1 becomes undef by internal regex, since it has no capture groups.

Match against accpetable control characters using index() instead of a regex.

Signed-off-by: Orgad Shaneh <orgads@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/gitweb/gitweb.perl b/gitweb/gitweb.perl
index b67972ec5..8d34d5588 100755
--- a/gitweb/gitweb.perl
+++ b/gitweb/gitweb.perl
@@ -1538,7 +1538,7 @@ sub sanitize {
 	return undef unless defined $str;
 
 	$str = to_utf8($str);
-	$str =~ s|([[:cntrl:]])|($1 =~ /[\t\n\r]/ ? $1 : quot_cec($1))|eg;
+	$str =~ s|([[:cntrl:]])|(index("\t\n\r", $1) != -1 ? $1 : quot_cec($1))|eg;
 	return $str;
 }