From f66c68f676422bd73b5fc932b5b4827002b0a48e Mon Sep 17 00:00:00 2001
From: Brion Vibber <brion@users.mediawiki.org>
Date: Fri, 7 Jan 2011 23:52:19 +0000
Subject: [PATCH] * (bug 26625) fix regression in Special:PrefixIndex from
 r75314; pages weren't listed if namespace was set but no prefix given

---
 includes/specials/SpecialPrefixindex.php | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/includes/specials/SpecialPrefixindex.php b/includes/specials/SpecialPrefixindex.php
index 47aed804cf..09e7734c2e 100644
--- a/includes/specials/SpecialPrefixindex.php
+++ b/includes/specials/SpecialPrefixindex.php
@@ -54,12 +54,17 @@ class SpecialPrefixindex extends SpecialAllpages {
 			: wfMsg( 'prefixindex' )
 		);
 
+		$showme = '';
 		if( isset( $par ) ){
-			$this->showPrefixChunk( $namespace, $par, $from );
+			$showme = $par;
 		} elseif( $prefix != '' ){
-			$this->showPrefixChunk( $namespace, $prefix, $from );
+			$showme = $prefix;
 		} elseif( $from != '' ){
-			$this->showPrefixChunk( $namespace, $from, $from );
+			// For back-compat with Special:Allpages
+			$showme = $from;
+		}
+		if ($showme != '' || $namespace) {
+			$this->showPrefixChunk( $namespace, $showme, $from );
 		} else {
 			$wgOut->addHTML( $this->namespacePrefixForm( $namespace, null ) );
 		}
-- 
2.20.1