Merge pull request dotnet/coreclr#10319 from JosephTremoulet/NullField
authorJoseph Tremoulet <JCTremoulet@gmail.com>
Mon, 20 Mar 2017 21:13:14 +0000 (17:13 -0400)
committerGitHub <noreply@github.com>
Mon, 20 Mar 2017 21:13:14 +0000 (17:13 -0400)
Permit null object in `GenTreeUseEdgeIterator`

Commit migrated from https://github.com/dotnet/coreclr/commit/281da0a152ff5dc65b4bebcc95d19ec8e4a4508e


Trivial merge