[PATCH] Cleanup of channels.

[Darren Tucker]

On Tue, 23 Apr 2019 at 19:20, Markus Schmidt <markus at blueflash.cc> wrote:
> Attached patch frees a few more memory blocks that would otherwise leak
> at the end of the program (rather inconsequential).

applied thanks, however I omitted the != NULL tests since ANSI C
defines free(NULL) as a no-op.

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Darren Tucker (dtucker at dtucker.net)
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