Don't show the comment link and the comment ''Reply'' button for attachment change entries (which currently don't have valid cnum values)
Don't show the comment link and the comment ''Reply'' button for attachment change entries (which currently don't have valid cnum values)

git-svn-id: eda3d06fcef731589ace1b284159cead3416df9b@4402 af82e41b-90c4-0310-8c96-b1721e28e2e2

walty8/trac,netjunki/trac-Pygit2,jun66j5/trac-ja,walty8/trac,netjunki/trac-Pygit2,netjunki/trac-Pygit2,walty8/trac,jun66j5/trac-ja,jun66j5/trac-ja,jun66j5/trac-ja,walty8/trac