Provide slightly more specific error messages when parsing hashes.
Provide slightly more specific error messages when parsing hashes.

* subversion/libsvn_subr/hash.c
  (svn_hash__read_entry): In error messages, hint at which part of the
   serialized hash failed to parse, rather than using the same error
   message in all failure cases. Fix typo in comment while here.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1678147 13f79535-47bb-0310-9956-ffa450edef68

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