Fix bug when using -p switch during compression
Fix bug when using -p switch during compression

When using the -p switch during encoding, the encoder should try
different qlp predictor precision steps. However, some faulty code
was too severely restricting the possible steps. This patch lifts
the restriction to match a restriction coded a little further in
the process. This doesn't make using -p worth your while, but at
least it doesn't create larger files now

Signed-off-by: Erik de Castro Lopo <1586a8e151fb6d548e7a343b9bcdfea42e83ffc0@mega-nerd.com>

waitman/flac,waitman/flac,waitman/flac,waitman/flac,waitman/flac