Fix Zend lib for plural translation for language with only 1 plural form (chinese)


git-svn-id: https://forge.indepnet.net/svn/glpi/trunk@21109 35612d4c-9d10-0410-837c-bf9dd1be60d7
fix ticket template preview


git-svn-id: https://forge.indepnet.net/svn/glpi/trunk@21112 35612d4c-9d10-0410-837c-bf9dd1be60d7