Index: includes/install.mysqli.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/install.mysqli.inc,v
retrieving revision 1.10
diff -u -p -r1.10 install.mysqli.inc
--- includes/install.mysqli.inc	19 Nov 2007 19:53:51 -0000	1.10
+++ includes/install.mysqli.inc	22 Nov 2007 15:37:39 -0000
@@ -29,7 +29,7 @@ function drupal_test_mysqli($url, &$succ
 
   // Decode url-encoded information in the db connection string.
   $url['user'] = urldecode($url['user']);
-  $url['pass'] = urldecode($url['pass']);
+  $url['pass'] = isset($url['pass']) ? urldecode($url['pass']) : NULL;
   $url['host'] = urldecode($url['host']);
   $url['path'] = urldecode($url['path']);