tree a0137e1e3e14b08cb94bed7f739a1cbc43547216
parent 477913b9aa9c337be46fa573a0cd11b48dd5e7c3
author Peng Xu <pengxu@google.com> 1491526349 -0700
committer Peng Xu <pengxu@google.com> 1491526349 -0700

Clarify that reserved function pointers has to be set to null

Test: no, comment change
Change-Id: I2b295c721cf199bcec779c8606ee1deb9fdf0a5c