[MusicXML import] issues with Neuraton PhotoScore produced XML
A MusicXML file produced by Neuraton PhotoScore causes Beta 2 a925ae0 to produce an unreadable .mscz file. This same file is quietly not opened by the Nightly build ec8913a. MuseScore 1.3 has no problem producing a valid .mscz file from the xml.
In both MuseScore 2.0 cases, I needed to first reply yes to "load anyway?" in a "Invalid XML file" dialog box. This dialog box is triggered by PhotoScore's producing a null pair. (It would be nice to just disable the rejection of a null encoding-date since it prevents being informed about any potentially troublesome errors.)
The file that produces the problems is attached. The score has 18 measures and 4 parts. (The last two parts have nothing but rests. I tried editing the last two parts out but that did not cure the problems.)