Handle namespace aliases.

llvm-svn: 82644
diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index af9f7e9..bc8cc26 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -1635,6 +1635,7 @@
   case Decl::UsingDirective:
   case Decl::ClassTemplate:
   case Decl::FunctionTemplate:
+  case Decl::NamespaceAlias:
     break;
   case Decl::CXXConstructor:
     EmitCXXConstructors(cast<CXXConstructorDecl>(D));