Fix error cannot read property 'trim' of undefined in common.js file (Common.parseGenre)

[KHALED-LAKEHAL]

Common.parseGenre = function(origVal) { // test value if (typeof origVal === 'undefined') return []; else { // match everything inside parentheses var split = origVal.trim().split(/((.*?))/g).filter(function(val) { return val !== ''; }); var array = []; for (var _i = 0, split_1 = split; _i < split_1.length; _i++) { var cur = split_1[_i]; if (/^\d+$/.test(cur) && !isNaN(parseInt(cur, 10))) { cur = ID3v1Parser_1.Genres[cur]; } array.push(cur); } return array .filter(function(val) { return val !== undefined; }).join('/'); } };

[Borewit]

@AlgeriaSoft Maybe your intention was to send this pull request to music-metadata?