Explicitly initialize the base class of LogStream
authorChristopher Dykes <cdykes@fb.com>
Thu, 15 Jun 2017 23:51:24 +0000 (16:51 -0700)
committerFacebook Github Bot <facebook-github-bot@users.noreply.github.com>
Fri, 16 Jun 2017 00:05:33 +0000 (17:05 -0700)
commita219d071ce833de7736d9ecba566be672f5da0c6
treed1871a27784865e3fd34ae0a76d4e79738347a98
parent3e0109050b85eed86eaee3b9affeb512b1e0da9a
Explicitly initialize the base class of LogStream

Summary:
The standard does not define that `std::ostream` should have a default constructor, so this was invalid and was an error on Windows.
This explicitly initializes the base class by passing a `nullptr`.

Reviewed By: simpkins

Differential Revision: D5259690

fbshipit-source-id: b8914d73ff2682e1a4447b8338860259778b2247
folly/experimental/logging/LogStream.cpp