(svn_fs__err_dangling_rev): Remove const from REV parameter to fix MSVC warning.
(svn_fs__err_dangling_rev): Remove const from REV parameter to fix
MSVC warning.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion