Fix Illegal string offset 'dashboard'

/** Fix Illegal string offset 'dashboard' */
function fix_admin_slug( $admin_slug ) {
    if ( ! isset( $admin_slug['dashboard'] ) ) {
        $fix_admin_slug = array(
            'dashboard' => 'jnews',
        );

        $admin_slug = array_merge( (array) $admin_slug, $fix_admin_slug );
    }

    return apply_filters( 'jnews_admin_slug', $admin_slug );
}
add_filter( 'jnews_get_admin_slug', 'fix_admin_slug', 99 );