[Plugin: Query Multiple Taxonomies] wrong posts count

I made some debugging …
Inside widgets.php we have the function:

private function generate_lists( $taxonomies, $data )

the the get_terms function returns the correct number of posts …

$terms = $this->get_terms( $taxonomy );

but the walker mess up with the count inside:

$data_tax = array(
				'taxonomy' => $taxonomy,
				'title' => get_taxonomy( $taxonomy )->label,
				'term-list' => $walker->walk( $terms, 0 )
			);

I dont know how the Walker class works … If anyone can help ?

Another question: Is there a way to remove the terms that do not have any posts?

Ok … I made a patch to walkers.php the counter is working for categories. I did not test with multiple taxonomies.

Replace function count() inside class QMT_Data_Container for this:

function count() {
		$old_query = qmt_get_query();

		if ( $this->data['is-selected'] ) {
			return $GLOBALS['wp_query']->post_count;
		}

		$query = array(
				'tax_query' => array(
						'relation' => 'AND'
				)
		);

		// Considering previous choices
		if ( isset( $old_query[ $this->taxonomy ] ) ) {
			$terms = explode('+', $old_query[ $this->taxonomy ]);
			$terms[] = $this->term->slug;
		} else {
			$terms = $this->term->slug;
		}

		$query['tax_query'][] = array (
				'taxonomy' => $this->taxonomy,
				'field' => 'slug',
				'terms' => $terms,
				'include_children' => 0,
				'operator' => 'AND'
		);

		return QMT_Count::get( $query );
	}

Now, how do I remove the categories that do not have posts ?