Fix character offset bug in snippet generation

Change-Id: Ic4a6435de3b4b6561ebef71a6e07901fcabe662a
diff --git a/Changes b/Changes
index 6a6b75d..9063748 100644
--- a/Changes
+++ b/Changes
@@ -1,7 +1,9 @@
-0.55.9 2017-09-12
+0.55.9 2017-11-15
         - [bugfix] Serialize token identifier correctly for
           new corpora with text siglen (diewald)
         - [bugfix] Extend bytebuffer for relation payloads (diewald)
+        - [bugfix] Wrong char offsets in snippet generation, where
+          repositioning can result in exceeding the string (diewald)
 
 0.55.8 2017-09-05
         - [feature] Retrieve and display pagebreaks (diewald)