make-ngram-pfsg: bad results with new gawk version

[Matthias Thomae]

Hello Andreas,

make-ngram-pfsg gives me different results with different versions of 
gawk. The header and the links are the same, but the weights differ 
substantially.

I see the old behaviour with gawk 3.1.0 (on debian) and 3.1.1 (on suse), 
and the differing one with 3.1.3-1 and 3.1.3-2 (on debian). The newly 
created PFSGs cause some ASR error degradation...

Any clues?

Regards.
Matthias