IndexError: index 0 is out of bounds for axis 0 with size 0
For 4C29.30 (a different field that in https://git.astron.nl/RD/rapthor/-/issues/11 and https://git.astron.nl/RD/rapthor/-/issues/14) Im getting:
```
2023-09-23 20:56:03,564 - INFO - rapthor:image_1 - [32m[32m LOFAR/TGSS flux ratio = N/A[0m[0m
2023-09-23 20:56:03,564 - INFO - rapthor:image_1 - [32m[32m LOFAR-TGSS RA offset = N/A[0m[0m
2023-09-23 20:56:03,564 - INFO - rapthor:image_1 - [32m[32m LOFAR-TGSS Dec offset = N/A[0m[0m
```
[...]
`IndexError: index 0 is out of bounds for axis 0 with size 0`
FOV size is:
> grid_width_ra_deg = 1.8
> grid_width_dec_deg = 1.8
Same thing happened for 2.5 x 2.5 deg.
`field-MFS-image-pb.fits` at `image_2` for 1.8 x 1.8 deg looks like this:
issue