Fix useFind in SSR: check for server Cursor

[edemaine]

Fixes #334, as described in this comment.

Before this PR, server-side useFind printed a warning and returned []. After this PR, the warning is gone and the correct cursor.find() results are returned.

[CaptainN]

Thanks so much for taking the time to produce a PR! I'll review and get back to you soon.

[CaptainN]

I actually think this is kind of important to fix and ship. cc: @StorytellerCZ

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
2 out of 3 committers have signed the CLA.

:white_check_mark: CaptainN
:white_check_mark: edemaine
:x: Kevin Newman

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[CaptainN]

This is good to go. I'm not sure why the CLA thing is failing though.

[CaptainN]

@edemaine Great point. To be completely honest, I just wasn't sure Meteor's build pipeline supports ?? but yeah, it should totally use that. Feel free to make the change, or I can do it later. Thanks!

[denihs]

Hey @CaptainN and @edemaine, as soon as this last matter is figured out, let me know, and I'll release these changes. :palms_up_together:

[edemaine]

To be completely honest, I just wasn't sure Meteor's build pipeline supports ?? but yeah, it should totally use that.

I believe ?? was introduced at the same time as ?., so should be safe.

Feel free to make the change, or I can do it later.

Done! This should be good to go now.

[denihs]

Version 2.5.1 is now up :tada: