[clang] [Sema] LambdaScopeForCallOperatorInstantiationRAII - fix typo in early out logic (PR #96888)

[Simon Pilgrim via cfe-commits]

https://github.com/RKSimon updated https://github.com/llvm/llvm-project/pull/96888

>From 7f6614d8df9a5ed2027f90d813695bc43f1044b2 Mon Sep 17 00:00:00 2001
From: Simon Pilgrim <llvm-dev at redking.me.uk>
Date: Thu, 27 Jun 2024 11:09:32 +0100
Subject: [PATCH] [Sema] LambdaScopeForCallOperatorInstantiationRAII - fix typo
 in early out logic

We should be checking for a failed dyn_cast on the ParentFD result - not the loop invariant FD root value.

Seems to have been introduced in #65193

Noticed by static analyser (I have no specific test case).
---
 clang/lib/Sema/SemaLambda.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/clang/lib/Sema/SemaLambda.cpp b/clang/lib/Sema/SemaLambda.cpp
index e9476a0c93c5d..ca9c7cb9faadf 100644
--- a/clang/lib/Sema/SemaLambda.cpp
+++ b/clang/lib/Sema/SemaLambda.cpp
@@ -2391,7 +2391,7 @@ Sema::LambdaScopeForCallOperatorInstantiationRAII::
       Pattern =
           dyn_cast<FunctionDecl>(getLambdaAwareParentOfDeclContext(Pattern));
 
-      if (!FD || !Pattern)
+      if (!ParentFD || !Pattern)
         break;
 
       SemaRef.addInstantiatedParametersToScope(ParentFD, Pattern, Scope, MLTAL);