Log Message:
fasttracker2: update to b152

Changes since b150:

Beta #152 - 27.04.2019
- Fixed a potential calculation overflow bug in the mixer code in beta #151.
  This is a critical fix, so please update.
- Windows: Updated the Visual Studio project from 2017 to 2019

Beta #151 - 25.04.2019
- Fixed: The interpolation routine was slightly wrong when playing backwards on
  pingpong-samples.
- Small mixer optimization for very tight sample loops
- Fixed yet a problem with the sample playback line in Smp. Ed. when flicking
  through the instrument list.
- Fixed a bug where the scopes and sample playback line in Smp. Ed. would not
  work correctly with the "Play Wave/Range/Display" function, when the \ 
currently
  selected sample is not 0.