[clang] Reapply "[clang] Fix name lookup for dependent bases" (PR #118003)

[via cfe-commits]

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@@ -243,9 +251,8 @@ bool CXXBasePaths::lookupInBases(ASTContext &Context,
         return FoundPath;
       }
     } else if (VisitBase) {
-      CXXRecordDecl *BaseRecord;
+      CXXRecordDecl *BaseRecord = nullptr;
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safocl wrote:

this change makes an additional reinitialization in the else case

https://github.com/llvm/llvm-project/pull/118003