getCategoryList should not include tag names

[redsweater]

The getCategoryList implementation currently returns a list of all categories from the database, including those that are actually tag names. My understanding is that storage of tag names in the categories table is an implementation detail. The tag items should be filtered from the list that is returned by getCategoryList().

[redsweater]

Patch to exclude non-category taxonomies from the getCategoryList function.

[redsweater]

Attaching patch xmlrpc.php.diff, with a change to exclude any categories whose type bitfield does not contain TAXONOMY_CATEGORY.

[ryan]

You can do the check directly in the query.

WHERE (type & " . TAXONOMY_CATEGORY . " != 0)

[rob1n]

(In [5215]) Don't show categories in getCategoryList. fixes #4114

[rob1n]

Whoops, that changeset should be "Don't show tags" not "Don't show categories."