vl: Tighten parsing of -m argument
strtosz_suffix() fails unless the size is followed by 0, whitespace or ','. Useless here, because we need to fail for any junk following the size, even if it starts with whitespace or ','. Check manually. Things like "-m 1024," are now caught. Signed-off-by: NMarkus Armbruster <armbru@redhat.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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