PHP Notice: Undefined variable: random_author_query

Error location: jetpack/modules/theme-tools/random-redirect.php on line 66.

Solution: replace the following:

// Set author name if we're on an author archive.
if ( is_author() ) {
    $random_author_name = get_the_author_meta( 'user_login' );
    $random_author_query = 'AND user_login = "' . $random_author_name . '"';
}

with:

// Set author name if we're on an author archive.
if ( is_author() ) {
    $random_author_name = get_the_author_meta( 'user_login' );
    $random_author_query = 'AND user_login = "' . $random_author_name . '"';
} else {
    $random_author_query = '';
}

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