Large taxonomies, memory issue

Hi, in your code you call this to count terms in a vocabulary:

$count = count(taxonomy_get_tree($vocabulary->vid));

This doesn't work on large taxonomies (100K+), you get a PHP memory issue. My page crashes even with 1GB. A cleaner way to do it:

$count = db_result(db_query('SELECT count(tid) FROM {term_data} WHERE vid=%d', $vocabulary->vid));

Works like a charm! Even with 1mio terms.

Patch attached for 6.x-2.x-dev.