#4867 (ok 4.4.4) Incorrect ALTER TABLE statement generated

[Marc Delisle]

Scenario:
1. Create a table with 2 columns
2. Display its structure
3. For the second column, use the Drop action and confirm
4. In the "Add 1 column(s)" dialog, click on Go
5. Enter the new column name and click on Save

[Marc Delisle]

Fix: https://github.com/phpmyadmin/phpmyadmin/pull/1654