sdl::mixer::sys is not public

[PeterShinners]

I can access sdl::sys but not sdl::mixer::sys from my own code. This seems useful as I am trying to access functions not exposed by the sdl2 bindings.

In the base sdl library it is defined as pub extern crate sdl2_sys as sys;. In the mixer module it is declared as use sys;. It feels like this is a simple oversight that is a non-controversial change.

I am still early days learning Rust. I may likely be doing something incorrect, or requesting something inappropriate.

[Cobrand]

No you are totally right, it should be fixed. sdl2_mixer was another crate at first (and was merged into this one later on), but at that time its ::sys was not public, and making the sys public was not part of the initial merge plan. This is related to issue #647, which has for roots closed issue #564.

[Cobrand]

Closed by #782