Remove compile warnings for building for 64 bit
Remove compile warnings for building for 64 bit

mrackwitz/MRProgress,odyth/MRProgress,hanangellove/MRProgress,yungfan/MRProgress,AddAloner/MRProgress,AddAloner/MRProgress,AlexanderMazaletskiy/MRProgress,AlexanderMazaletskiy/MRProgress,boherna/MRProgress,zaubara/MRProgress,jackywpy/MRProgress,zaubara/MRProgress,colemancda/MRProgress,yungfan/MRProgress,yarry/MRProgress,odyth/MRProgress,colemancda/MRProgress,zaubara/MRProgress,mrackwitz/MRProgress,yarry/MRProgress,boherna/MRProgress,hanangellove/MRProgress,jackywpy/MRProgress