bug #4632 Notice in ./libraries/Util.class.php#1916 Undefined index: query.
Url may not necessarily have a query part

Signed-off-by: Madhura Jayaratne <madhura.cj@gmail.com>
Merge branch 'QA_4_3' of github.com:phpmyadmin/phpmyadmin into QA_4_3
Merge branch 'QA_4_3'