Bug fix with possible colour range on red

Cargo.toml

 [package]
 name = "dotacat"
-version = "0.1.2"
+version = "0.1.3"
 authors = ["Stephen <stephen@scd31.com>"]
 description = "Like lolcat, but fast"
 edition = "2018"

src/lol.rs

@@ -4,7 +4,7 @@ use std::io::{stdout, Write};
 use std::process::exit;
 
 fn rainbow(freq: f64, i: f64) -> (u8, u8, u8) {
-    let red = ((freq * i).sin() * 127.0) as u8 + 128;
+    let red = ((freq * i).sin() * 127.0) as i16 + 128;
     let green = ((freq * i + 2.0 * consts::PI / 3.0).sin() * 127.0) as i16 + 128;
     let blue = ((freq * i + 4.0 * consts::PI / 3.0).sin() * 127.0) as i16 + 128;
     (red as u8, green as u8, blue as u8)