Also compare source to itself as the null case.
Also compare source to itself as the null case.

binondord/librsync,Salamek/librsync,potatogim/librsync,agrandville/librsync,VictorDenisov/librsync,yrgoldteeth/librsync,librsync/librsync,librsync/librsync,yrgoldteeth/librsync,VictorDenisov/librsync,pauloppenheim-liveloop/librsync,potatogim/librsync,Salamek/librsync,potatogim/librsync,librsync/librsync,pauloppenheim-liveloop/librsync,sourcefrog/librsync,dbaarda/librsync,yrgoldteeth/librsync,pauloppenheim-liveloop/librsync,yrgoldteeth/librsync,binondord/librsync,binondord/librsync,pauloppenheim-liveloop/librsync-winbuild,sourcefrog/librsync,pauloppenheim-liveloop/librsync-winbuild,dbaarda/librsync,VictorDenisov/librsync,dbaarda/librsync,agrandville/librsync,sourcefrog/librsync,VictorDenisov/librsync,librsync/librsync,dbaarda/librsync,agrandville/librsync,sourcefrog/librsync,pauloppenheim-liveloop/librsync-winbuild,Salamek/librsync