tree 63be7e1435ae43197e38399c70f98e95f1b71170
parent 641611d98475eb4e8f4bd77ed71823e7f864c768
author Joe Tsai <joetsai@digital-static.net> 1568953732 -0700
committer Joe Tsai <joetsai@digital-static.net> 1569257027 +0000

proto/equal: equate nil

Modify Equal to treat nil messages as equal iff both are nil.
Of special note, a typed nil pointer to T is equal to a new(T)
since they are indistinguishable from a protobuf reflection.

Change-Id: Ibf90b43a982e7376e07b4159be198f06230ec194
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/196618
Reviewed-by: Damien Neil <dneil@google.com>