Variable-length complex column array descriptors are incorrect

[attipaci]

When storing variable-length data in FITS, the main table contains only array descriptors, which locate the data on the heap. The descriptor consists of an element count, and a heap byte offset.

However, prior to 1.18, we used the count of Java elements, rather than the count of FITS elements. Thus, when complex values were stored, the length component indicated the number of float or double components, which are a factor of 2 larger than the number of expected complex components. While our library would read this back fine (hence tests passed), other libraries would not be able to properly read FITS produced by us as a result.

This issue is resolved in PR #442

[attipaci]

Merged with PR #442.