[reSIProcate] Helper::computeTag()

[Zsolt Rizsanyi <rizsanyi@xxxxxxxxxxxxxxxxxxxxx>]

Hi!

The implementation of computeTag() looks like this:
Data
Helper::computeTag(int numBytes)
{
   return Random::getRandomHex(4);
}

As you can see it has an int parameter but it is not used instead 4 is used 
for the length of the tag.

Could somebody with svn access please fix this?

Thanks,
Zsolt