[clang] [ASTContext] Add a break to nested switch in `encodeTypeForFunctionPointerAuth` (PR #99763)

[Paul Kirth via cfe-commits]

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@@ -3363,6 +3363,7 @@ static void encodeTypeForFunctionPointerAuth(const ASTContext &Ctx,
 #include "clang/Basic/RISCVVTypes.def"
       llvm_unreachable("not yet implemented");
     }
+    break;
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ilovepi wrote:

won't you get an error for having a `default` case on a fully covered switch? Plus that will remain working if someone adds a new enum value, but doesn't update this code, right?

https://github.com/llvm/llvm-project/pull/99763