Quick abspath assertion in reintegrate merge

[Daniel Shahaf]

[[[
% cd wc1/trunk/
% $svn cp -q A A2
% $svn ci -q -mbr
% echo >>A2/mu
% $svn ci -q -mmod
% cd A
% $svn merge --reintegrate ../A2
subversion/libsvn_wc/wc_db.c:6685: (apr_err=235000)
svn: E235000: In file 'subversion/libsvn_wc/wc_db.c' line 6685: assertion 
failed (svn_dirent_is_absolute(local_abspath))
zsh: abort      $SVN merge --reintegrate ../A2
% 
]]]