From: BangLang Huang <banglang.huang@foxmail.com>
Date: Fri, 24 Feb 2017 02:52:52 +0000 (+0800)
Subject: nvram: improve argument check when program start
X-Git-Url: http://git.ozo.com/?a=commitdiff_plain;h=c7e2a6fe923dc86bab14d94ead322a045efca4c9;hp=c7e2a6fe923dc86bab14d94ead322a045efca4c9;p=lede-git%2F.git

nvram: improve argument check when program start

print help message when argument count is less
than 2.

Signed-off-by: BangLang Huang <banglang.huang@foxmail.com>
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