Better sanity check handling WordITerator 2

diff --git a/src/library/index_bundle_iterators/WordIterator.php b/src/library/index_bundle_iterators/WordIterator.php
index 206d90661..81a710799 100644
--- a/src/library/index_bundle_iterators/WordIterator.php
+++ b/src/library/index_bundle_iterators/WordIterator.php
@@ -993,7 +993,7 @@ class WordIterator extends IndexBundleIterator
         if (!empty($postings_entry)) {
             $postings_info = $index->unpackPostings($postings_entry);
             if (!empty($postings_info)) {
-                list($postings,) = $index->unpackPostings($postings_entry);
+                list($postings,) = $postings_info;
             }
         }
         $this->dictionary_info[$generation]['POSTINGS'] = $postings;