When 0 synop records are indicated in the main header in a v-file, the synop header is still included with another 0 to indicate the number of synop records (again). This line needs to be skipped when there are no synop data before moving on to read the rest of the file.
This is certainly the case with vobs, so it is assumed that it is also the case for vfld.
Fixes #73
When 0 synop records are indicated in the main header in a v-file, the synop header is still included with another 0 to indicate the number of synop records (again). This line needs to be skipped when there are no synop data before moving on to read the rest of the file.
This is certainly the case with vobs, so it is assumed that it is also the case for vfld.