Fix range check

The getarray() function checks to see if there's enough room in
the buffer, but it's using a byte count for the available size
and a possibly non-byte count for the space required.  Dividing
down by the unit size corrects the problem.

Bug 8713753

Change-Id: Id42c0df65c3233dcc5f76d05e229f7d40d4c1f99
1 file changed