Subzero: Use C++11 member initializers where practical.

src/IceBrowserCompileServer.h

Index: src/IceBrowserCompileServer.h
diff --git a/src/IceBrowserCompileServer.h b/src/IceBrowserCompileServer.h
index 4075d9d3f27390c37ce5ff92912bee31b676faf4..473889d0be54c8eaf6e70e4c2ea76c16db31f59a 100644
--- a/src/IceBrowserCompileServer.h
+++ b/src/IceBrowserCompileServer.h
@@ -100,7 +100,7 @@ private:
   // A borrowed reference to the current InputStream. The compiler owns
   // the actual reference so the server must be careful not to access
   // after the compiler is done.
-  llvm::QueueStreamer *InputStream;
+  llvm::QueueStreamer *InputStream = nullptr;
   std::unique_ptr<Ostream> LogStream;
   std::unique_ptr<llvm::raw_fd_ostream> EmitStream;
   std::unique_ptr<StringStream> ErrorStream;