@lenik I agree with Jivings. There isn't anything explicitly pointing to your comment saying that it resolved the issue, other than possibly that single upvote.
I do agree that it definitely is a duplicate, and thus should be marked as such. I would just go and answer the original question with what you said in the comments; something along the lines of:
I provided this solution in the comments and it appears that it resolved the OP's issue, albeit with confirmation on the OP's part. Here's my answer:
[Comment's contents here]
From what it looks like, this feature is put in place so we don't give a user a question that, although it may be resolved in the comments, isn't clear (as @Jivings stated).