Zero length Buffer.write error

[capocasa]

Reproduction:

(fork {
  s.bootSync;
  b=Buffer.alloc(s,0);
  s.sync;
  b.write("/tmp/a.wav");
})

Expected behavior:

Optionally,
(1) An error message id displayed that zero length buffers may not be saved

(2) Perhaps preferably, writing of a zero length sound file with the correct header.

Actual behavior:

An error message is displayed
File '/tmp/a.wav' could not be opened: Format not recognised.
and a zero-length file (with no header) is written, that causes further confusing error messages when attempting to read it.