Added postgres support for user specific forum tracking.

mod/forum/db/postgres7.php

@@ -141,6 +141,11 @@ function forum_upgrade($oldversion) {
                         );');
   }
 
+  if ($oldversion < 2005042301) { // Add user tracking prefs field.
+      modify_database('','ALTER TABLE prefix_user ADD
+                         trackforums integer default 0 NOT NULL;');
+  }
+
   return true;
 
 }