Added an unused_rounding lint

Author: botahamec

clippy_lints/src/lib.rs

@@ -908,6 +908,7 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
     store.register_early_pass(|| Box::new(duplicate_mod::DuplicateMod::default()));
     store.register_early_pass(|| Box::new(unused_rounding::UnusedRounding));
     store.register_late_pass(|| Box::new(get_first::GetFirst));
+    store.register_early_pass(|| Box::new(unused_rounding::UnusedRounding));
     // add lints here, do not remove this comment, it's used in `new_lint`
 }