Misc cleanup. NFC.

These were lost when I reverted the raw_ostream changes.

llvm-svn: 234504
diff --git a/llvm/lib/Support/Debug.cpp b/llvm/lib/Support/Debug.cpp
index a88b18e..eb99242 100644
--- a/llvm/lib/Support/Debug.cpp
+++ b/llvm/lib/Support/Debug.cpp
@@ -114,9 +114,9 @@
   // know that debug mode is enabled and dbgs() really is a
   // circular_raw_ostream.  If NDEBUG is defined, then dbgs() ==
   // errs() but this will never be invoked.
-  llvm::circular_raw_ostream *dbgout =
-    static_cast<llvm::circular_raw_ostream *>(&llvm::dbgs());
-  dbgout->flushBufferWithBanner();
+  llvm::circular_raw_ostream &dbgout =
+      static_cast<circular_raw_ostream &>(llvm::dbgs());
+  dbgout.flushBufferWithBanner();
 }
 
 /// dbgs - Return a circular-buffered debug stream.