[clang] [Clang] Fix name lookup for dependent bases (PR #114978)

[Vladislav Belov via cfe-commits]

================
@@ -265,8 +268,8 @@ bool CXXBasePaths::lookupInBases(ASTContext &Context,
             BaseRecord = nullptr;
         }
       } else {
-        BaseRecord = cast<CXXRecordDecl>(
-            BaseSpec.getType()->castAs<RecordType>()->getDecl());
+        if (auto *RT = BaseSpec.getType()->getAs<RecordType>())
+          BaseRecord = cast<CXXRecordDecl>(RT->getDecl());
----------------
vbe-sc wrote:

This is almost same. To be correct, we need to replace the first variant with 
```c++
BaseRecord = cast<CXXRecordDecl>(BaseSpec.getType()->getAsRecordDecl());
```

All in all, thanks for this comment. Fixed

https://github.com/llvm/llvm-project/pull/114978