Fix a warning

Warning: Invalid argument supplied for foreach() in /../plugins/post-views-counter/includes/settings.php on line 117

fix

if(is_array($wp_roles->roles)){
			foreach ( apply_filters( 'editable_roles', $wp_roles->roles ) as $role => $details ) {
				$roles[$role] = translate_user_role( $details['name'] );
			}
		}

https://ww.wp.xz.cn/plugins/post-views-counter/