git: openjdk/skara: Fix another index out of bounds in webrev generation

[duke]

Changeset: db3e4c08
Author:    Robin Westberg <rwestberg at openjdk.org>
Date:      2019-08-19 12:15:05 +0000
URL:       https://git.openjdk.java.net/skara/commit/db3e4c08

Fix another index out of bounds in webrev generation

Reviewed-by: ehelin

! webrev/src/main/java/org/openjdk/skara/webrev/HunkCoalescer.java
! webrev/src/test/java/org/openjdk/skara/webrev/WebrevTests.java