Fix a few MSVC warnings.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@91714 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGBuiltin.cpp b/lib/CodeGen/CGBuiltin.cpp
index a3f83a7..a791fd0 100644
--- a/lib/CodeGen/CGBuiltin.cpp
+++ b/lib/CodeGen/CGBuiltin.cpp
@@ -853,7 +853,5 @@
 
 Value *CodeGenFunction::EmitPPCBuiltinExpr(unsigned BuiltinID,
                                            const CallExpr *E) {
-  switch (BuiltinID) {
-  default: return 0;
-  }
+  return 0;
 }