Fix parsing aligned textgrids
Fix parsing aligned textgrids


MontrealCorpusTools/PolyglotDB,PhonologicalCorpusTools/PyAnnotationGraph,PhonologicalCorpusTools/PyAnnotationGraph,PhonologicalCorpusTools/PolyglotDB,PhonologicalCorpusTools/PolyglotDB,MontrealCorpusTools/PolyglotDB