[question]What about it means when the return value is 0

[emscripten_webgl_create_context](https://emscripten.org/docs/api_reference/html5.h.html?highlight=current_context#c.emscripten_webgl_create_context)

The **Returns** is described as follows in the documentation:

```
On success, a strictly positive value that represents a handle to the created context. On failure, a negative number that can be cast to an EMSCRIPTEN_RESULT field to get the reason why the context creation failed.
EMSCRIPTEN_WEBGL_CONTEXT_HANDLE
```

Is it **SUCCESS** or **FAILURE** when the return value is **0**?