X3fDecoder::decompressSigma(): store huff on heap.
X3fDecoder::decompressSigma(): store huff on heap.

this probably results in awful padding!

darktable-org/rawspeed,LebedevRI/rawspeed,LebedevRI/rawspeed,LebedevRI/rawspeed,darktable-org/rawspeed,darktable-org/rawspeed,LebedevRI/rawspeed,LebedevRI/rawspeed,darktable-org/rawspeed,darktable-org/rawspeed