gitweb: Fix bug in href(..., -replay=>1) when using 'pathinfo' form

URLs generated by href(..., -replay=>1) (which includes 'next page'
links and alternate view links) didn't set project info correctly
when current page URL is in pathinfo form.

This resulted in broken links such like:

  http://www.example.com/w/ARRAY(0x85a5318)?a=shortlog;pg=1

if the 'pathinfo' feature was used, or

  http://www.example.com/w/?a=shortlog;pg=1

if it wasn't, instead of correct:

  http://www.example.com/w/project.git?a=shortlog;pg=1

This was caused by the fact that href() always replays params in the
arrayref form, were they multivalued or singlevalued, and the code
dealing with 'pathinfo' feature couldn't deal with $params{'project'}
being arrayref.

Setting $params{'project'} is moved before replaying params; this
ensures that 'project' parameter is processed correctly.

Noticed-by: Peter Oberndorfer <kumbayo84@arcor.de>
Noticed-by: Wincent Colaiuta <win@wincent.com>
Signed-off-by: Jakub Narebski <jnareb@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

gitweb/gitweb.perl

@@ -611,6 +611,8 @@ (%)
 	);
 	my %mapping = @mapping;
 
+	$params{'project'} = $project unless exists $params{'project'};
+
 	if ($params{-replay}) {
 		while (my ($name, $symbol) = each %mapping) {
 			if (!exists $params{$name}) {
@@ -620,8 +622,6 @@ (%)
 		}
 	}
 
-	$params{'project'} = $project unless exists $params{'project'};
-
 	my ($use_pathinfo) = gitweb_check_feature('pathinfo');
 	if ($use_pathinfo) {
 		# use PATH_INFO for project name