merge -r 2012 from trunk to branch-1_7

keyword search was not working comments.php

git-svn-id: http://piwigo.org/svn/branches/branch-1_7@2013 68402e56-0260-453c-a942-63ccdbb3a9ee

comments.php

@@ -117,7 +117,7 @@ if (isset($_GET['keyword']) and !empty($_GET['keyword']))
                 '$s',
                 'return "content LIKE \'%$s%\'";'
                 ),
-              preg_split('/[\s,;]+/', $keyword)
+              preg_split('/[\s,;]+/', $_GET['keyword'] )
               )
       ).
     ')';