bug fix - truncated lightcurves should remember their sub-class instead of falling back to generic lightcurve.
bug fix - truncated lightcurves should remember their sub-class instead of falling back to generic lightcurve.

Alex-Ian-Hamilton/sunpy,dpshelio/sunpy,dpshelio/sunpy,dpshelio/sunpy,Alex-Ian-Hamilton/sunpy,Alex-Ian-Hamilton/sunpy