Activating a robber in Catan clarification
a) Rolling a “7”✹ and Activating the Robber
  If you roll a “7,” no one receives any resources.
  Instead, every player who has more than 7 Resource Cards
  must select half (rounded down) of his Resource Cards and
  return them to the bank.


https://www.catan.com/en/download/?SoC_rv_Rules_091907.pdf

There's no mention of an exemption for the player who rolled a 7.