Sort of rough alphaTab patch (improves support for GuitarPro mobile-generated .gpx files)

gistfile1.diff

--- lib/alphaTab/alphaTab.js.orig       2011-01-07 23:13:06.000000000 +0100
+++ lib/alphaTab/alphaTab.js    2012-10-27 11:40:15.000000000 +0200
@@ -2173,8 +2173,12 @@
                        beat.id = Std.parseInt(beatNode.att.resolve("id"));
                        beat.dyn = beatNode.node.resolve("Dynamic").getInnerData();
                        beat.rhythmId = Std.parseInt(beatNode.node.resolve("Rhythm").att.resolve("ref"));
+                    try {
                        beat.noteIds = this.toIntArray(beatNode.node.resolve("Notes").getInnerData());
                        this.gpxDocument.beats.push(beat);
+                    } catch(e) {
+                        // We don't really care
+                    }
                }
                }}
        }
@@ -6475,12 +6479,12 @@
                                        var b = 0;
                                        while(b < gpxVoice.beatIds.length) {
                                                var gpxBeat = this._document.getBeat(gpxVoice.beatIds[b]);
-                                               var rhythm = this._document.getRhythm(gpxBeat.rhythmId);
+                                               var rhythm = this._document.getRhythm(gpxBeat ? gpxBeat.rhythmId : gpxVoice.beatIds[b]);
                                                var beat = this.getBeat(measure,start);
                                                var voice = beat.voices[v % beat.voices.length];
                                                voice.isEmpty = false;
                                                this.parseRhythm(rhythm,voice.duration);
-                                               if(gpxBeat.noteIds != null) {
+                                               if(gpxBeat && gpxBeat.noteIds != null) {
                                                        var velocity = this.parseDynamic(gpxBeat);
                                                        var n = 0;
                                                        while(n < gpxBeat.noteIds.length) {