`SEGFAULT` when running `04_sound_api.py` or `05_color_palette.py`
Hello,

My setup is:
* Arch Linux
* Python 3.6.6
* Pyxel 0.7.6

When launching the `04_sound_api.py` or `05_color_palette.py` examples, I get a segmentation fault a few seconds after.

Is there a way to properly backtrack segfaulting code in Python?