ippiResizeSuper and initialization buffer

I am a bit confused by the initialization buffer for ippiResizeSuper.

When calling ippiResizeGetSize, it provides me with a size for an initialization buffer. This initialization buffer is sometimes used by other ResizeXXXInit function. However, ippiResizeSuperInit does not take an initialization buffer as input.

What confuses me is that ippiResizeGetSize returns me a non-zero size for the initialization buffer (64 in my case), despite the fact that this functions has the type of interpolation (ippSuper) as an argument.

What am I supposed to do with this initialization buffer of size 64? If it is unused, shouldn't ippiResizeGetSize have a less ambiguous behavior and return an initialization buffer size of zero?

I am using IPP 2017.0.0 on Windows 7 64bits.

Pascal