fix max len

app.py

@@ -161,9 +161,9 @@ def run(model_name, tab, instruments, drum_kit, bpm, mid, midi_events, seed, see
         mid = tokenizer.tokenize(MIDI.midi2score(mid))
         mid = np.asarray(mid, dtype=np.int64)
         mid = mid[:int(midi_events)]
-        max_len += len(mid)
         for token_seq in mid:
             mid_seq.append(token_seq.tolist())
+    max_len += len(mid)
     init_msgs = [create_msg("visualizer_clear", False)]
     for tokens in mid_seq:
         init_msgs.append(create_msg("visualizer_append", tokenizer.tokens2event(tokens)))