On the fsfs-format7 branch: fix compiler warning

* subversion/libsvn_fs_fs/transaction.c
  (fold_change): put parantheses around assignment inside condition


git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/fsfs-format7@1484192 13f79535-47bb-0310-9956-ffa450edef68