[PATCH] parsemail.sh: Fix usage via stdin.

[Stephen Finucane]

On Tue, 2017-03-14 at 19:09 +0100, Ralf Baechle wrote:
> Commit e56391f66cb8 ("trivial: Standardize variable naming in
> scripts")
> sneaked in a checked for missing command line arguments in
> parsemail.sh
> which broke typical argument-less usage for mail delivery.  Revert
> that
> again.
> 
> Signed-off-by: Ralf Baechle <ralf at linux-mips.org>

Reviewed-by: Stephen Finucane <stephen at that.guru>

...and applied.