civicrm_note.privacy should be varchar

This column is an implicit foreign key to civicrm_option_value.value, which has a data type of varchar(512). It's possible to create, within the GUI, an option value for the group note_privacy that has a string value, and although this string value is properly included in the "Privacy" select list when editing/creating a note, it can't be saved properly because civicrm_note.privacy currently has a data type of int(10).

This patch intends to change the data type of this field to varchar(512). I'm not sure if just changing this file is enough, though. Should I also be patching somewhere else?