egui: don't clear navmesh after routing is done

src/bin/topola-egui/top.rs

@@ -129,14 +129,14 @@ impl Top {
                                     Err(err) => return,
                                 };
 
+                                if let InvokerStatus::Finished = status {
+                                    break;
+                                }
+
                                 if let Execute::Autoroute(ref mut autoroute) = execute {
                                     shared_data_arc_mutex.lock().unwrap().navmesh =
                                         autoroute.navmesh().clone();
                                 }
-
-                                if let InvokerStatus::Finished = status {
-                                    break;
-                                }
                             };
                         });
                     }