From 7d65cf10e3d7747033b83fa18c5f3d2a498f66bc Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Wed, 17 Dec 2014 05:29:16 -0500
Subject: [PATCH] unfuck binfmt_misc.c (broken by commit e6084d4)

scanarg(s, del) never returns s; the empty field results in s + 1.
Restore the correct checks, and move NUL-termination into scanarg(),
while we are at it.

Incidentally, mixing "coding style cleanups" (for small values of cleanup)
with functional changes is a Bad Idea(tm)...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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