[flac-dev] Message about compression ratio with stdin input

[lvqcl]

If I use flac with piped input it warns:

FAILURE: Compression failed (ratio 495232,432, should be < 1.0).
This happens for some files for one or more of the following reasons:
  * Recompressing an existing FLAC from a higher to a lower compression setting.
  * Insufficient input data  (eg, very short files, < 10000 frames).
  * The audio data is not compressable (eg a full range white noise signal).



Reproducible with the following command line:

flac --ignore-chunk-sizes - -o out.flac < test.wav