From: Jan Engelhardt <ej@inai.de>
Date: 2024-11-02 23:48:50.447834368 +0100

g++-14 does more checks even on _unexpanded_ templates; hence this
new error that did not show up in g++-12.

Building encode.cc under g++-14 yielded:

```
./../include/fst/fst.h:690:59: error: no match for 'operator=' (operand types are 'std::unique_ptr<fst::SymbolTable, std::default_delete<fst::SymbolTable> >' and 'fst::SymbolTable*')
 690 |     isymbols_ = impl.isymbols_ ? impl.isymbols_->Copy() : nullptr;
```

---
 src/include/fst/fst.h |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Index: openfst-1.8.3/src/include/fst/fst.h
===================================================================
--- openfst-1.8.3.orig/src/include/fst/fst.h
+++ openfst-1.8.3/src/include/fst/fst.h
@@ -687,8 +687,8 @@ class FstImpl {
     properties_.store(impl.properties_.load(std::memory_order_relaxed),
                       std::memory_order_relaxed);
     type_ = impl.type_;
-    isymbols_ = impl.isymbols_ ? impl.isymbols_->Copy() : nullptr;
-    osymbols_ = impl.osymbols_ ? impl.osymbols_->Copy() : nullptr;
+    isymbols_.reset(impl.isymbols_ ? impl.isymbols_->Copy() : nullptr);
+    osymbols_.reset(impl.osymbols_ ? impl.osymbols_->Copy() : nullptr);
     return *this;
   }