ASACORE-1121: Tweak unit test to not trigger MALLOC_CHECK_ bug.

Using MALLOC_CHECK_=3 seems to have a problem if you allocate a buffer
that is smaller than the size of a pointer.  This change just tweaks a
unit test to not allocate such a buffer.

Change-Id: I7d5f6f03927a7666b008a7238c33c6177fe2f2a8
Signed-off-by: Steve Kinneberg <stevek@qce.qualcomm.com>
Merge "ASACORE-1121: Tweak unit test to not trigger MALLOC_CHECK_ bug."