Do not search for global functions if scripted.

src/optimizer.rs

@@ -1229,7 +1229,7 @@ fn optimize_expr(expr: &mut Expr, state: &mut OptimizerState, _chaining: bool) {
         => {
             // First search for script-defined functions (can override built-in)
             #[cfg(not(feature = "no_function"))]
-            let has_script_fn = state.lib.iter().any(|&m| m.get_script_fn(&x.name, x.args.len()).is_some());
+            let has_script_fn = state.lib.iter().copied().any(|m| m.get_script_fn(&x.name, x.args.len()).is_some());
             #[cfg(feature = "no_function")]
             let has_script_fn = false;