[clang] [clang][NFC] Prevent scope pollution from repeat type specifiers (PR #193144)

[Timm Baeder via cfe-commits]

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@@ -5076,7 +5076,11 @@ void Parser::ParseEnumSpecifier(SourceLocation StartLoc, DeclSpec &DS,
                          (AllowEnumSpecifier == AllowDefiningTypeSpec::Yes ||
                           CanBeOpaqueEnumDeclaration);
 
-  CXXScopeSpec &SS = DS.getTypeSpecScope();
+  // We use a temporary scope when parsing the name specifier for a
+  // declaration with additional invalid type specifiers
----------------
tbaederr wrote:

```suggestion
  // declaration with additional invalid type specifiers.
```

https://github.com/llvm/llvm-project/pull/193144