Fix misguided type selection

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@61393 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaExprCXX.cpp b/lib/Sema/SemaExprCXX.cpp
index 9ffa6ae..d367a91 100644
--- a/lib/Sema/SemaExprCXX.cpp
+++ b/lib/Sema/SemaExprCXX.cpp
@@ -516,7 +516,7 @@
 
   // Check if this function is already declared.
   {
-    DeclContext::decl_iterator Alloc, AllocEnd;
+    DeclContext::lookup_iterator Alloc, AllocEnd;
     for (llvm::tie(Alloc, AllocEnd) = GlobalCtx->lookup(Context, Name);
          Alloc != AllocEnd; ++Alloc) {
       // FIXME: Do we need to check for default arguments here?