Reduce the size of this block

        :param int new_size: The new size
        :return: None

def shrink(self, new_size):
        """
        Reduce the size of this block

        :param int new_size: The new size
        :return: None
        """
        self.size = new_size

        if self.sort == 'string':
            self.null_terminated = False # string without the null byte terminator
            self._content[0] = self._content[0][ : self.size]

        elif self.sort == 'pointer-array':
            pointer_size = self.binary.project.arch.bytes

            if self.size % pointer_size != 0:
                # it's not aligned?
                raise BinaryError('Fails at Data.shrink()')

            pointers = self.size // pointer_size
            self._content = self._content[ : pointers]

        else:
            # unknown
            self._content =  [ self._content[0][ : self.size ] ]