On the fsfs-format7 branch: fix index RLE packing logic

* subversion/libsvn_fs_fs/index.c
  (rle_array): compare start element to element at iterator index

git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/fsfs-format7@1476638 13f79535-47bb-0310-9956-ffa450edef68