Index: includes/theme.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/theme.inc,v
retrieving revision 1.415.2.13
diff -p -0 -r1.415.2.13 theme.inc
*** includes/theme.inc	16 Oct 2008 13:50:59 -0000	1.415.2.13
--- includes/theme.inc	23 Oct 2008 19:36:15 -0000
*************** function _theme_process_registry(&$cache
*** 264 ****
--- 265 ----
+   $result = array();
*************** function _theme_process_registry(&$cache
*** 360 ****
--- 362,381 ----
+ 
+   // Let themes have preprocess functions even if they didn't register a template.
+   if ($type == 'theme' || $type == 'base_theme') {
+     foreach ($cache as $hook => $info) {
+       // Check only if it's a template and not registered by the theme or engine
+       if (!empty($info['template']) && empty($result[$hook])) {
+         if (!isset($info['preprocess functions'])) {
+           $cache[$hook]['preprocess functions'] = array();
+         }
+         if (function_exists($name . '_preprocess')) {
+           $cache[$hook]['preprocess functions'][] = $name . '_preprocess';
+         }
+         if (function_exists($name . '_preprocess_' . $hook)) {
+           $cache[$hook]['preprocess functions'][] = $name . '_preprocess_' . $hook;
+         }
+         // Ensure uniqueness.
+         $cache[$hook]['preprocess functions'] = array_unique($cache[$hook]['preprocess functions']);
+       }
+     }
+   }