[clang] [Clang][Sema][NFC]Use isa_and_nonnull to simplify the code and avoid build warning (PR #84181)

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github-actions[bot] wrote:

<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


:warning: C/C++ code formatter, clang-format found issues in your code. :warning:

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``````````bash
git-clang-format --diff 33e312137b065ba330b187f56ddd60df70927241 470e3fc13b66d53920f579a7fb848741418e5c0f -- clang/lib/Sema/SemaExceptionSpec.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/Sema/SemaExceptionSpec.cpp b/clang/lib/Sema/SemaExceptionSpec.cpp
index 0ce00dd0f8..74551db0f7 100644
--- a/clang/lib/Sema/SemaExceptionSpec.cpp
+++ b/clang/lib/Sema/SemaExceptionSpec.cpp
@@ -10,7 +10,6 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "clang/Sema/SemaInternal.h"
 #include "clang/AST/ASTMutationListener.h"
 #include "clang/AST/CXXInheritance.h"
 #include "clang/AST/Expr.h"
@@ -19,6 +18,7 @@
 #include "clang/AST/TypeLoc.h"
 #include "clang/Basic/Diagnostic.h"
 #include "clang/Basic/SourceManager.h"
+#include "clang/Sema/SemaInternal.h"
 #include "llvm/ADT/SmallPtrSet.h"
 #include "llvm/ADT/SmallString.h"
 #include "llvm/Support/Casting.h"

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https://github.com/llvm/llvm-project/pull/84181