uncompressed data to lz uncompress fuunction

[darkworks]

if uncompressed data is passed to lz uncompress function , it return nothing

so it will be good if uncompress data like say 1234 is passed it return same 1234 because its not compressed.
for that i think we should add prefix parameter to uncompress function , but default lzcompress function i think user @ as prefix so if uncompress function cant find @ or any other prefix passed to it in data then it should return same input which i passed to it

thanks