[Detail]
Issue description:
In other places, the return value of inet_aton is always checked.  So
the whitescan ask for the same check here.

Solution:
Add check of the return value.

[Verified Cases]
Build Pass: eduk1_demo
Test Pass: eduk1_demo

Change-Id: I3614c162c5ed7a1222c4b1d8ec7f4e1b1bc612c3
Signed-off-by: Nyilu.myl <yilu.myl@alibaba-inc.com>