[clang] [clang] Change representation of CurLexerKind (PR #70381)

[Aaron Ballman via cfe-commits]

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@@ -767,7 +762,7 @@ class Preprocessor {
   /// \#included, and macros currently being expanded from, not counting
   /// CurLexer/CurTokenLexer.
   struct IncludeStackInfo {
-    enum CurLexerKind           CurLexerKind;
+    LexerCallback CurLexerCallback;
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AaronBallman wrote:

Can you align this with the other nearby declarations?

https://github.com/llvm/llvm-project/pull/70381