Fix breakage introduced during the FSFS->FSX port in r1726036.
Fix breakage introduced during the FSFS->FSX port in r1726036.

* subversion/libsvn_fs_x/verify.c
  (expect_buffer_nul): Revert to old code.

git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1726115 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion