Patch for Drupal6 (and Pressflow6 too) cache

drupal6_cache.patch

diff --git a/www/includes/cache.inc b/www/includes/cache.inc
index 1e70960..d08f3f4 100644
--- a/www/includes/cache.inc
+++ b/www/includes/cache.inc
@@ -17,9 +17,9 @@ function cache_get($cid, $table = 'cache') {
 
   // Garbage collection necessary when enforcing a minimum cache lifetime
   $cache_flush = variable_get('cache_flush_'. $table, 0);
-  if ($cache_flush && ($cache_flush + variable_get('cache_lifetime', 0) <= time())) {
+  if ($cache_flush + variable_get('cache_lifetime', 0) <= time()) {
     // Reset the variable immediately to prevent a meltdown in heavy load situations.
-    variable_set('cache_flush_'. $table, 0);
+    variable_set('cache_flush_'. $table, time());
     // Time to flush old cache data
     db_query("DELETE FROM {". $table ."} WHERE expire != %d AND expire <= %d", CACHE_PERMANENT, $cache_flush);
   }