"Taxonomy: Terms by Vocab" filter removes valid first taxonomy term if vocabulary is not required

When I attempt to add a filter "Taxonomy: Terms for Vocab" where "Vocab" is not required, the first term in the vocabulary is removed from the filter options. This seems to be happening b/c function views_taxonomy_form() unsets $form['#options'][0] if the vocabulary is not required:

file: modules/views_taxonomy.inc

239   else {
240     $form = taxonomy_form($vocabulary->vid, 0, $vocabulary->help);
241     unset($form['#title']);
242     unset($form['#description']);
243     if (!$vocabulary->required) {
244       unset($form['#options'][0]);
245     }
246     unset($form['#default_value']);
247     $form['#multiple'] = TRUE;
248   }

In the taxonomy module of drupal 5.10, function _taxonomy_term_select() (called by taxonomy_form), sets the 'blank' option key to '', not 0:

file: taxonomy.module

1185   if ($blank) {
1186     $options[''] = $blank;
1187   }

So instead of "- None - " being removed from the options in the form, the first valid taxonomy term is unset.

Here's the patch:

Index: views_taxonomy.inc
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/views/modules/Attic/views_taxonomy.inc,v
retrieving revision 1.27.2.12
diff -u -r1.27.2.12 views_taxonomy.inc
--- views_taxonomy.inc	14 Jul 2007 19:30:51 -0000	1.27.2.12
+++ views_taxonomy.inc	25 Sep 2008 23:45:01 -0000
@@ -241,7 +241,7 @@
     unset($form['#title']);
     unset($form['#description']);
     if (!$vocabulary->required) {
-      unset($form['#options'][0]);
+      unset($form['#options']['']);
     }
     unset($form['#default_value']);
     $form['#multiple'] = TRUE;