fix for gcode op before all others (no tool set)

src/kiri-mode/cam/animate.js

@@ -469,8 +469,10 @@ kiri.load(() => {
             renderMoves(id, moves, send);
         } else {
             last = next;
+            if (tool) {
                 tool.pos = next.point;
                 toolUpdate = { mesh_move: { id, pos: next.point }};
+            }
             renderPath(send);
         }
     }