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/AST/DeclObjC.cpp b/lib/AST/DeclObjC.cpp
index b441f7f..4ddbb22 100644
--- a/lib/AST/DeclObjC.cpp
+++ b/lib/AST/DeclObjC.cpp
@@ -604,12 +604,12 @@
   assert((!SelLocs.empty() || isImplicit()) &&
          "No selector locs for non-implicit method");
   if (isImplicit())
-    return setParamsAndSelLocs(C, Params, ArrayRef<SourceLocation>());
+    return setParamsAndSelLocs(C, Params, llvm::None);
 
   SelLocsKind = hasStandardSelectorLocs(getSelector(), SelLocs, Params,
                                         DeclEndLoc);
   if (SelLocsKind != SelLoc_NonStandard)
-    return setParamsAndSelLocs(C, Params, ArrayRef<SourceLocation>());
+    return setParamsAndSelLocs(C, Params, llvm::None);
 
   setParamsAndSelLocs(C, Params, SelLocs);
 }