[clang] [StaticAnalyzer] Make it a noop when initializing a field of empty record (PR #138594)

[Balazs Benics via cfe-commits]

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@@ -715,7 +716,11 @@ void ExprEngine::handleConstructor(const Expr *E,
         // actually make things worse. Placement new makes this tricky as well,
         // since it's then possible to be initializing one part of a multi-
         // dimensional array.
-        State = State->bindDefaultZero(Target, LCtx);
+        const CXXRecordDecl *TargetHeldRecord =
+            dyn_cast_or_null<CXXRecordDecl>(CE->getType()->getAsRecordDecl());
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steakhal wrote:

Can this be ever null? If not, shouldn't we rather use `llvm::cast<>` instead?

https://github.com/llvm/llvm-project/pull/138594