Fix crash of Samsung phones

Using an alternative SMS app like chompSMS leads to a crash as
sendResult is an array without any entries (sendResult[0] is accessed)
The default SMS app does not show this because mCurrntCmd == null

Change-Id: Icfef6d20f9082dd1f64ed29b67031d2575896513

Patchset: 1
http://review.cyanogenmod.org/#/c/77528/