[clang] [Clang] add support for C23 'H', 'D', and 'DD' length modifiers (PR #201098)

[Aaron Ballman via cfe-commits]

================
@@ -7988,6 +7992,19 @@ void CheckFormatHandler::HandleIncompleteSpecifier(const char *startSpecifier,
                        getSpecifierRange(startSpecifier, specifierLen));
 }
 
+bool CheckFormatHandler::CheckUnsupportedType(
+    const analyze_format_string::ArgType &AT, const Expr *E,
+    const char *startSpecifier, unsigned specifierLen) {
----------------
AaronBallman wrote:

```suggestion
    const char *StartSpecifier, unsigned SpecifierLen) {
```

https://github.com/llvm/llvm-project/pull/201098