Fix offset retrieval in concurrent searches

Change-Id: I5c5392c9128fbbb37a415c5de2e84cf3ce4af324
diff --git a/Changes b/Changes
index c0274ca..1ddd2d7 100644
--- a/Changes
+++ b/Changes
@@ -1,3 +1,7 @@
+0.58.8 2019-11-05
+    - [bugfix] Fix offset retrieval in concurrent searches
+      (diewald)
+
 0.58.7 2019-09-16
     - [bugfix] Fix the behaviour of negative operands in virtual
       corpora (diewald)