Small hack to force a particular language within a course.

No interface on course/edit.php ... I want to try this on
moodle.org for a while to try and stop the encoding problems

lib/db/postgres7.sql

@@ -31,6 +31,7 @@ CREATE TABLE prefix_course (
    visible integer NOT NULL default '1',
    groupmode integer NOT NULL default '0',
    groupmodeforce integer NOT NULL default '0',
+   lang varchar(5) NOT NULL default '',
    timecreated integer NOT NULL default '0',
    timemodified integer NOT NULL default '0'
 );