Fix build errors
Fix build errors

andreamazz/FDWaveformView,fulldecent/FDWaveformView,fulldecent/FDWaveformView,solomon23/FDWaveformView,solomon23/FDWaveformView,NghiaTranUIT/FDWaveformView,ywzw2013/FDWaveformView,NghiaTranUIT/FDWaveformView,ale0xB/FDWaveformView,johnryan/FDWaveformView,ywzw2013/FDWaveformView,ale0xB/FDWaveformView,ale0xB/FDWaveformView,johnryan/FDWaveformView,ale0xB/FDWaveformView,andreamazz/FDWaveformView,johnryan/FDWaveformView,andreamazz/FDWaveformView,solomon23/FDWaveformView,solomon23/FDWaveformView,johnryan/FDWaveformView,NghiaTranUIT/FDWaveformView,fulldecent/FDWaveformView,ywzw2013/FDWaveformView,NghiaTranUIT/FDWaveformView,ywzw2013/FDWaveformView