prepfold runs many processes regardless of -ncpus setting

[paulray]

With the new version of PRESTO, we are finding that on our Ubuntu linux machine, prepfold is spawning 36 processes to do a simple fold. For example, this runs at at CPU percentage of 3600

prepfold -o oink -par 0900-3144.par  guppi_55464_J1124-36_0002_subs_0001.fits

This is the same if you add -ncpus 2, or whatever.

Was there some change to the OpenMP code or something with the meson build that might cause this?