[ticket/12956] Ensure the contact columns have been added before using t...

[nickvergessen]

...hem

https://tracker.phpbb.com/browse/PHPBB3-12956

[bantu]

With this patch I get

PHP Fatal error:  SQL ERROR [ mysqli ]<br /><br />Unknown column 'field_show_on_pm' in 'field list' [1054]<br /><br />SQL<br /><br />INSERT INTO community_profile_fields  (field_name, field_type, field_ident, field_length, field_minlen, field_maxlen, field_novalue, field_default_value, field_validation, field_required, field_show_novalue, field_show_on_reg, field_show_on_pm, field_show_on_vt, field_show_profile, field_hide, field_no_view, field_active, field_is_contact, field_contact_desc, field_contact_url, field_order) VALUES ('phpbb_twitter', 'profilefields.type.string', 'phpbb_twitter', '20', '1', '15', '', '', '[\\w_]+', 0, 0, 0, 1, 1, 1, 0, 0, 1, 1, 'VIEW_TWITTER_PROFILE', 'http://twitter.com/%s', 5) in .../phpBB/phpbb/db/driver/driver.php on line 844

[bantu]

This SQL error seems to be caused by me not dropping all tables correctly before restoring from backup.