Add missing newline on eof + check for that

Jakub Jelenrequested to merge
jjelen/libssh-mirror:eol-eof into master

MacOS is choking on these:

/Users/gitlab/builds/libssh/libssh-mirror/src/packet_cb.c:508:2: error: no newline at end of file [-Werror,-Wnewline-eof]
}
 ^
1 error generated.

Checklist

  • Commits have Signed-off-by: with name/author being identical to the commit author
  • Code modified for feature
  • Test suite updated with functionality tests
  • Test suite updated with negative tests
  • Documentation updated
  • The project pipelines timeout is extended at least to 2 hours.

Reviewer's checklist:

  • Any issues marked for closing are addressed
  • There is a test suite reasonably covering new functionality or modifications
  • Function naming, parameters, return values, types, etc., are consistent and according to CONTRIBUTING.md
  • This feature/change has adequate documentation added
  • No obvious mistakes in the code

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