From 33e2efcde9388d196a823ffaac24d57f1a4a5217 Mon Sep 17 00:00:00 2001
From: Pieter Frenssen <pieter@frenssen.be>
Date: Mon, 28 Jan 2013 15:09:12 +0100
Subject: [PATCH] Issue #1900974 by pfrenssen: Rebuild delta map cache if it is
 empty.

---
 facetapi.block.inc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/facetapi.block.inc b/facetapi.block.inc
index 55a38be..21b11bf 100644
--- a/facetapi.block.inc
+++ b/facetapi.block.inc
@@ -195,7 +195,7 @@ function facetapi_check_block_visibility($delta) {
 function facetapi_get_delta_map() {
   $map = &drupal_static(__FUNCTION__);
   if (NULL === $map) {
-    if ($data = cache_get('facetapi:delta_map')) {
+    if ($data = cache_get('facetapi:delta_map') && !empty($data->data)) {
       $map = $data->data;
     }
     else {
-- 
1.8.1