Fixed typo

src/graph/Node.cpp

@@ -330,7 +330,7 @@ Aidge::NodePtr Aidge::Node::cloneSharedOperators() const {
 }
 
 Aidge::NodePtr Aidge::Node::cloneSharedProducers() const {
-    std::shared_ptr<Operator> op = (op->type() == Producer_Op::Type)
+    std::shared_ptr<Operator> op = (mOperator->type() == Producer_Op::Type)
         ? mOperator
         : std::shared_ptr<Operator>(mOperator->clone());