[flang][msvc] Reapply "Explicitly reference "this" inside closure"

Reapply {D88052}

Reviewed By: Meinersbur

Differential Revision: https://reviews.llvm.org/D96066

GitOrigin-RevId: bdb40dd14e84efb27e0c416c64721e8390b854e3
diff --git a/lib/Semantics/symbol.cpp b/lib/Semantics/symbol.cpp
index 656c993..edd2c84 100644
--- a/lib/Semantics/symbol.cpp
+++ b/lib/Semantics/symbol.cpp
@@ -258,11 +258,11 @@
               return has<SubprogramNameDetails>() || has<EntityDetails>();
             },
             [&](const DerivedTypeDetails &) {
-              const auto *derived{detailsIf<DerivedTypeDetails>()};
+              const auto *derived{this->detailsIf<DerivedTypeDetails>()};
               return derived && derived->isForwardReferenced();
             },
             [&](const UseDetails &x) {
-              const auto *use{detailsIf<UseDetails>()};
+              const auto *use{this->detailsIf<UseDetails>()};
               return use && use->symbol() == x.symbol();
             },
             [](const auto &) { return false; },