Tidy one rs_error( call.
Tidy one rs_error( call.

dbaarda/librsync,librsync/librsync,sourcefrog/librsync,librsync/librsync,librsync/librsync,sourcefrog/librsync,dbaarda/librsync,dbaarda/librsync,sourcefrog/librsync,dbaarda/librsync,sourcefrog/librsync,librsync/librsync