[PATCH] gitweb: Measure offsets against UTF-8 flagged string

[Shin Kojima <shin@kojima.org>]

Offset positions should not be counted by byte length, but by actual
character length.

>    5183 	# We need to untabify lines before split()'ing them;
>    5184 	# otherwise offsets would be invalid.

Horizontal tab is not the only case we need to consider.  Please excuse
me for using your name here, but the following URL can not find "match"
occurances while using `git-instaweb` on the git repository.

    http://127.0.0.1:1234/?p=.git&a=search&h=HEAD&st=grep&s=Nar%C4%99bski

Signed-off-by: Shin Kojima <shin@kojima.org>
---
 gitweb/gitweb.perl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gitweb/gitweb.perl b/gitweb/gitweb.perl
index 2594a4bad..a5a9093a1 100755
--- a/gitweb/gitweb.perl
+++ b/gitweb/gitweb.perl
@@ -1697,7 +1697,7 @@ sub unquote {
 
 # escape tabs (convert tabs to spaces)
 sub untabify {
-	my $line = shift;
+	my $line = to_utf8(shift);
 
 	while ((my $pos = index($line, "\t")) != -1) {
 		if (my $count = (8 - ($pos % 8))) {
-- 
2.17.0