rba-sdl2: Trying spin_sleep crate

Former-commit-id: 1c6a36a1a61be3949080a8c86915235aaf25d0e5

Cargo.toml

@@ -24,6 +24,7 @@ bitflags = "1.1.0"
 zip = "0.5.3"
 ctrlc = "3.1.3"
 cpal="0.10.0"
+spin_sleep="0.3.7"
 
 [[bin]]
 name = "rba-sdl2"

src/plat/sdl2/main.rs

@@ -2,6 +2,8 @@ extern crate sdl2;
 use sdl2::event::Event;
 use sdl2::keyboard::Keycode;
 
+extern crate spin_sleep;
+
 use std::cell::RefCell;
 use std::rc::Rc;
 
@@ -115,7 +117,7 @@ fn main() {
                 match delay {
                     None => {}
                     Some(delay) => {
-                        ::std::thread::sleep(delay);
+                        spin_sleep::sleep(delay);
                     }
                 };
             }