Small CS fix

[Nyholm]

Just a super minor thing I found when browsing the source code.

This file might be easier to view than the diff: https://github.com/php/php-src/blob/1e9a5c67ef6d075df16d4183abf62e4c99b2f8c6/sapi/fpm/fpm/fpm_request.h

[thg2k]

I have a ton of stuff like this in my git... i never know whether i should PR those. Let's see if this one is accepted, I might start to submit mine.

[nikic]

It would be better to fix this by removing alignment. That is, move the comments before the declaration.

[Nyholm]

I usually dont poke around in this repo. But Im currently trying to track down a nasty bug in my app and I saw this file while I was working.

Feel free to close if the maintainers think this is just noise.