Make CodeGenFunction::EmitDecl() recognise CXXClass/CXXStruct/CXXUnion.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@52162 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGDecl.cpp b/lib/CodeGen/CGDecl.cpp
index e7085fb..fe58ca0 100644
--- a/lib/CodeGen/CGDecl.cpp
+++ b/lib/CodeGen/CGDecl.cpp
@@ -35,6 +35,9 @@
   case Decl::Union:     // union X;
   case Decl::Class:     // class X;
   case Decl::Enum:      // enum X;
+  case Decl::CXXStruct: // struct X; [C++]
+  case Decl::CXXUnion:  // union X; [C++]
+  case Decl::CXXClass:  // class X; [C++]
     // None of these decls require codegen support.
     return;