Specify correct size for 16 bit wave table

The wavetable needs to be zero-padded to avoid OOB access, since the
last offset and length point beyond the values in the initializer list.
Copy the length from the 8-bit wavetable.

Bug: 133880046
Test: manual
Change-Id: Ia2028d724a1d5ee11c32b5a60389375a5552db14
1 file changed