HuffmanTableVector: adjust to CodeSymbol::HaveCommonPrefix() changes
HuffmanTableVector: adjust to CodeSymbol::HaveCommonPrefix() changes

Given global ordering, given the code length, we know the minimal
code id.

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