Fix GCC compilation

[ekilmer]

Fixes a few errors reported by GCC and not Clang

1. "non-trivial designated initializers not supported"

   • Fixed by reordering array initialization to be in order.

2. "Cannot bind packed field"

   • Use a pointer instead of a reference. This isn't the greatest fix because it is basically the same thing, but seems to be checked less strictly with GCC. I think a real fix would be to remove the 'packed' annotations.

TODO:

• [x] Test in CI with GCC to prevent regressions