SB translation fix: sb_tidy_reference

function sb_tidy_reference ($start, $end, $add_link = FALSE, $translate_book = FALSE) {
    if (!trim($start['book'])) {
        return "";
    }
    $start_book = trim($start['book']);
    $end_book = trim($end['book']);

    if ($translate_book) {
        $translated_books = array_combine(sb_get_default('eng_bible_books'), sb_get_default('bible_books'));
        $t_start_book = $translated_books[$start_book];
        $t_end_book = $translated_books[$end_book];
    }
    else {
        $t_start_book = $start_book;
        $t_end_book = $end_book;
    }

    $start_chapter = trim($start['chapter']);
    $end_chapter = trim($end['chapter']);
    $start_verse = trim($start['verse']);
    $end_verse = trim($end['verse']);
    if ($add_link) {
        $t_start_book = "<a href=\"".sb_get_book_link($start_book)."\">{$t_start_book}</a>";
        $t_end_book = "<a href=\"".sb_get_book_link($end_book)."\">{$t_end_book}</a>";
    }
    if ($start_book == $end_book) {
        if ($start_chapter == $end_chapter) {
            if ($start_verse == $end_verse) {
                $reference = "$t_start_book $start_chapter:$start_verse";
            } else {
                $reference = "$t_start_book $start_chapter:$start_verse-$end_verse";
            }
        } else {
             $reference = "$t_start_book $start_chapter:$start_verse-$end_chapter:$end_verse";
        }
    } else {
        $reference =  "$t_start_book $start_chapter:$start_verse - $t_end_book $end_chapter:$end_verse";
    }
    return $reference;
}