Fix #11964 Undefined index: TABLE_COMMENT in database structure page

Signed-off-by: Madhura Jayaratne <madhura.cj@gmail.com>

ChangeLog

@@ -20,6 +20,7 @@ phpMyAdmin - ChangeLog
 - issue #11677 sql-parser and php-gettext collide.
 - issue #11920 Can't disable backquotes in export
 - issue #11911 Inserts via tbl_change.php in VARBINARY columns does not allow using HEX() and MD5()
+- issue #11964 Undefined index: TABLE_COMMENT in database structure page
 
 4.5.4.1 (2016-01-29)
 - issue #11892 Error with PMA 4.4.15.3

libraries/Util.class.php

@@ -4897,6 +4897,7 @@ class PMA_Util
                             'ENGINE' => '',
                             'TABLE_TYPE' => '',
                             'TABLE_ROWS' => 0,
+                            'TABLE_COMMENT' => '',
                         );
                     }
                 } // end while