[ms-inline asm] Instantiate the MCStreamer as a NullStream.  We're parsing
instruction, not emitting them, so a NullStream is fine.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@162105 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaStmt.cpp b/lib/Sema/SemaStmt.cpp
index 9240dad..86884b7 100644
--- a/lib/Sema/SemaStmt.cpp
+++ b/lib/Sema/SemaStmt.cpp
@@ -3010,7 +3010,7 @@
     // Tell SrcMgr about this buffer, which is what the parser will pick up.
     SrcMgr.AddNewSourceBuffer(Buffer, llvm::SMLoc());
 
-    OwningPtr<llvm::MCStreamer> Str;
+    OwningPtr<llvm::MCStreamer> Str(createNullStreamer(Ctx));
     OwningPtr<llvm::MCAsmParser>
       Parser(createMCAsmParser(SrcMgr, Ctx, *Str.get(), *MAI));
     OwningPtr<llvm::MCTargetAsmParser>