Rust nightly changes

[gkoz]

The trivial casts lint is upon us. Whoever starts fixing the warnings can leave a message here.

[gkoz]

It seems the trivial_numeric_casts lint may become allow by default.
rust-lang/rfcs#1020

[GuillaumeGomez]

Oh come on ! They're can't be serious ! It was a pain in the pass to update some of my libs yesterday and they say I did it for nothing ? Seriously... Well, luckily, I didn't start doing it on rgtk...

[gkoz]

What's worse, in cases of i64 as c_long (which can be i32 or i64 on different platforms) and vice versa, removing the cast would be incorrect.

[GuillaumeGomez]

For that, I totally agree. But I was thinking that they somehow found a way to cast automatically if this is a c_type to waiting type. Seemed logical to me...