restrict getPointer and withPointer to memoryCells.
restrict getPointer and withPointer to memoryCells.

- These functions were meant to be used when calling C functions.  As
  such this makes sense only in Memory elements storing instances of
  Storable i.e. MemoryCell.

  The generic versions used the underlyingPtr function which are
  misleading in the case of MemoryCells that store the element at
  the next available aligned cell.

piyush-kurur/raaz,piyush-kurur/raaz,raaz-crypto/raaz,raaz-crypto/raaz