Set settings.all_layers to 0

Test the handling of c->operating_point_idc in the output_picture_ready() function in src/lib.c.

The ubsan error in https://code.videolan.org/wtc/dav1d/-/jobs/444554 is exactly why I'm proposing this change. That bug should be fixed.

If dav1d_fuzzer.c uses a hardcoded value of settings.all_layer, it is better to use 0 than 1. We can certainly have dav1d_fuzzer.c test both 0 and 1. I am not sure if that's necessary though.

Ping on this?

mentioned in merge request !1366 (merged)

Fixed in !1366 (merged).

closed