undefined variable row on table creation, since the new logic for BIT values

libraries/tbl_properties.inc.php

@@ -234,10 +234,12 @@ for ($i = 0 ; $i <= $num_fields; $i++) {
         $row = $fields_meta[$i];
     }
 
+    if (isset($row) && isset($row['Type'])) {
         $type_and_length = PMA_extract_type_length($row['Type']);
         if ($type_and_length['type'] == 'bit') {
             $row['Default'] = PMA_printable_bit_value($row['Default'], $type_and_length['length']);
         }
+    }
 
     // Cell index: If certain fields get left out, the counter shouldn't chage.
     $ci = 0;