Location module update break event finder

For eventfinder users, I would say hold off on making use of any of the location module updates for now. Perhaps the location module updates should've been kept strictly to HEAD for Drupal 4.7. There's a growing frequency of modules directly interacting with each other and module dependencies that, in general, will eventually need to be addressed (maybe through some kind of module update protocol or something).

-Ankur

Here's a patch that brings eventfinder up to speed with location.

The location.module schema recently had a schema change where

(1) the "location_node" and "location_user" tables were merged into a single "location".
(2) In addition to that, the "uid" column from "location_user" and the "nid" column from "location_node" were combined into a single "oid" column.
(3) An extra column called "type" was added, whose value is either "node" or "user"

There was one more database change, but it was one that didn't affect eventfinder.

This patch update eventfinder to query the location table with the appropriate column names.

Please apply to DRUPAL-4-6 and HEAD.

-Ankur