FIX：Fix the crash that occurred when importing G-code file

Jira：STUDIO-13408

(cherry picked from commit 3810f4edfe086b9500860e59baf35e5568b56977)

src/libslic3r/GCode/GCodeProcessor.hpp

@@ -847,6 +847,9 @@ class Print;
                                               const std::vector<std::set<int>>& unprintable_filament_types );
         void apply_config(const PrintConfig& config);
         void set_print(Print* print) { m_print = print; }
+
+        DynamicConfig export_config_for_render() const;
+
         void enable_stealth_time_estimator(bool enabled);
         bool is_stealth_time_estimator_enabled() const {
             return m_time_processor.machines[static_cast<size_t>(PrintEstimatedStatistics::ETimeMode::Stealth)].enabled;