wavread is reading too much

[John W. Eaton]

On  7-Feb-2008, Julien Pommier wrote:

| Bug report for Octave 3.0.0 configured for i386-apple-darwin8.9.1
| 
| Description:
| -----------
| 
| wavread does not take into account the chunk size -- if the wav file  
| contains other chunks after the data chunk, they are wrongly  
| interpreted as audio data
| 
| For example, sony sound forge appends such chunks
| 
| Fix:
| ---
| "
| wavread.m line 153, replace the
|      length = Inf
|    with
|      length = (ck_size * 8)/bits_per_sample;

I made this change.

Thanks,

jwe