fixup! Add invalid null pointer usage lint.

Fix clippy**2.

Author: boxdot

clippy_lints/src/ptr.rs

@@ -217,7 +217,7 @@ fn check_invalid_ptr_usage<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) {
         let fun_def_path = cx.get_def_path(fun_def_id).into_iter().map(Symbol::to_ident_string).collect::<Vec<_>>();
         if let Some(&(_, arg_indices)) = INVALID_NULL_PTR_USAGE_TABLE
             .iter()
-            .find(|&&(fn_path, _)| fn_path == &fun_def_path);
+            .find(|&&(fn_path, _)| fn_path == fun_def_path);
         then {
             for &arg_idx in arg_indices {
                 if let Some(arg) = args.get(arg_idx).filter(|arg| is_null_path(cx, arg)) {