Garbage data when compensate are used without overlap.

[emotion3459]

Repro:

sup = clip.mv.Super()
bVec = sup.mv.Analyse(isb=True, delta=1)
ref = clip.mv.Compensate(sup, bVec)

When Analyse is called without overlap then other functions (such as compensate) will simply return garbage. The mvtools plugin should at least raise an exception in this case.

[emotion3459]

mvtools-sf appears to be fine so I assume this is a bug and not an inherent limitation.