OpaquePtr: Use nullptr construction for DeclGroupPtrTy OpaquePtr typedef

llvm-svn: 257956
diff --git a/clang/lib/Sema/SemaOpenMP.cpp b/clang/lib/Sema/SemaOpenMP.cpp
index ca63456..4d0d313 100644
--- a/clang/lib/Sema/SemaOpenMP.cpp
+++ b/clang/lib/Sema/SemaOpenMP.cpp
@@ -1141,7 +1141,7 @@
     CurContext->addDecl(D);
     return DeclGroupPtrTy::make(DeclGroupRef(D));
   }
-  return DeclGroupPtrTy();
+  return nullptr;
 }
 
 namespace {