Replace a default: with an explicit list of cases. No functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@165091 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/MicrosoftMangle.cpp b/lib/AST/MicrosoftMangle.cpp
index 380c737..26b4119 100644
--- a/lib/AST/MicrosoftMangle.cpp
+++ b/lib/AST/MicrosoftMangle.cpp
@@ -810,7 +810,12 @@
         break;
       }
       /* fallthrough */
-    } default: {
+    }
+    case TemplateArgument::Template:
+    case TemplateArgument::TemplateExpansion:
+    case TemplateArgument::Declaration:
+    case TemplateArgument::NullPtr:
+    case TemplateArgument::Pack: {
       // Issue a diagnostic.
       DiagnosticsEngine &Diags = Context.getDiags();
       unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,