Fix compiler warning.
Fix compiler warning.

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