Unexpected behavior in empty cells in output fits file #30
Description
With different installations of GLEAM, I am getting different behaviors on the empty cell in the output FITS file that contains the emission and absorption line fits.
If I run GLEAM from a local GLEAM sandbox (clone of git repository), the cell is empty, as intended.
If I run GLEAM from my PyPI installation, the cell is filled with 1.0E20, not as intended.
Both GLEAM installations use Astropy 4.2.
This could be an issue solved by using more recent versions of dependencies. At the moment we cannot upgrade dependencies until we figure out how to deal with #26.