[0.85] don't have link to create if don't have right

git-svn-id: https://forge.indepnet.net/svn/glpi/branches/0.85-work@20500 35612d4c-9d10-0410-837c-bf9dd1be60d7
[0.85] fix previous

git-svn-id: https://forge.indepnet.net/svn/glpi/branches/0.85-work@20501 35612d4c-9d10-0410-837c-bf9dd1be60d7