RLE decompression bugfix
RLE decompression bugfix

Replication of a bugfix made to the equivalent Python library: https://bitbucket.org/jaredhobbs/sas7bdat/commits/0554f445e071c3c7ee87d53f0271ac99e1728a34 (line 135)
arestenko/FSharp.Data.Toolbox,fsprojects/FSharp.Data.Toolbox,tpetricek/FSharp.Data.Toolbox