fix for systems like OS X that don't have B460800 etc.
fix for systems like OS X that don't have B460800 etc.

minghuam/macchina.io,nextsmsversion/macchina.io,minghuam/macchina.io,nextsmsversion/macchina.io,linuxvom/macchina.io,nextsmsversion/macchina.io,linuxvom/macchina.io,linuxvom/macchina.io,minghuam/macchina.io,minghuam/macchina.io,linuxvom/macchina.io,nextsmsversion/macchina.io,minghuam/macchina.io,linuxvom/macchina.io,nextsmsversion/macchina.io,minghuam/macchina.io,linuxvom/macchina.io,nextsmsversion/macchina.io,nextsmsversion/macchina.io