Follow-up to r1525429: Fix a copy-n-pasto.

* subversion/libsvn_fs_x/transaction.c
  (verify_moves): call the FSX-private API instead of FSFS

git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1525450 13f79535-47bb-0310-9956-ffa450edef68