Replace ArrayRef<T>() with None, now that we have an implicit ArrayRef constructor from None

Patch by Robert Wilhelm.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@181139 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CodeGenModule.h b/lib/CodeGen/CodeGenModule.h
index 0f4fe8a..7bbca80 100644
--- a/lib/CodeGen/CodeGenModule.h
+++ b/lib/CodeGen/CodeGenModule.h
@@ -750,8 +750,7 @@
   llvm::Value *getBuiltinLibFunction(const FunctionDecl *FD,
                                      unsigned BuiltinID);
 
-  llvm::Function *getIntrinsic(unsigned IID, ArrayRef<llvm::Type*> Tys =
-                                                 ArrayRef<llvm::Type*>());
+  llvm::Function *getIntrinsic(unsigned IID, ArrayRef<llvm::Type*> Tys = None);
 
   /// EmitTopLevelDecl - Emit code for a single top level declaration.
   void EmitTopLevelDecl(Decl *D);