Use the new Ps struct

ctru-rs/examples/futures-tokio-basic.rs

@@ -1,5 +1,6 @@
 use ctru::console::Console;
 use ctru::services::hid::KeyPad;
+use ctru::services::ps::Ps;
 use ctru::services::{Apt, Hid};
 use ctru::Gfx;
 use std::time::Duration;
@@ -9,11 +10,9 @@ fn main() {
     let gfx = Gfx::default();
     let hid = Hid::init().expect("Couldn't obtain HID controller");
     let apt = Apt::init().expect("Couldn't obtain APT controller");
+    let _ps = Ps::init().expect("Couldn't initialize PS service");
     let _console = Console::init(gfx.top_screen.borrow_mut());
 
-    // FIXME: replace this with `Ps` when #39 merges
-    assert!(unsafe { ctru_sys::psInit() } >= 0);
-
     // Give ourselves up to 30% of the system core's time
     apt.set_app_cpu_time_limit(30)
         .expect("Failed to enable system core");