[clang] [Clang][Interp] Fix the location of uninitialized base warning (PR #100761)

[Timm Baeder via cfe-commits]

================
@@ -122,22 +122,20 @@ static bool CheckFieldsInitialized(InterpState &S, SourceLocation Loc,
   }
 
   // Check Fields in all bases
-  for (const Record::Base &B : R->bases()) {
+  unsigned BaseIndex = 0;
+  const CXXRecordDecl *CD = dyn_cast<CXXRecordDecl>(R->getDecl());
----------------
tbaederr wrote:

```suggestion
  const auto *CD = dyn_cast<CXXRecordDecl>(R->getDecl());
```

https://github.com/llvm/llvm-project/pull/100761