Fix warning of signedness.
Fix warning of signedness.

* subversion/libsvn_fs_base/util/fs_skels.c
  (svn_fs_base__parse_representation_skel): Typecast 'const char' to
   'const unsigned char' for checksum_skel->children->next->data.

Review by: hwright


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@874761 13f79535-47bb-0310-9956-ffa450edef68

wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,wbond/subversion