rem: if (!av) return null;  var rv = this.inputStream.read(max); return rv; 
add: try { var rv = this.inputStream.read(max); return (rv != "") ? rv : null; } catch (ex) { return ""; } 
context: function fo_read(max){    if (!("inputStream" in this))        throw "file not open for reading.";    var av = this.inputStream.available();    if (typeof max == "undefined")        max = av;    if (!av)        return null;    var rv = this.inputStream.read(max);    return rv;}
meta: 1622	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/1622/35d33cf805376ff41cc7c6e2751735782268f27c/file-utils.js/clean/js/lib/file-utils.js