Small fix for LZW-Decoder.
Small fix for LZW-Decoder.

Well, the decoder does not really work now. I'll try to find better example
files.

flowlo/pdfread,lambdaX/pdfreader,durango/pdfreader,lanfeust21/pdfreader,lanfeust21/pdfreader,Lanzafame/pdfreader,lambdaX/pdfreader,tomjowitt/pdfreader,billychappell/pdfreader,shvgn/pdfreader,nathankerr/pdfreader,poorny/pdfreader,lanfeust21/pdfreader,cbw1992/pdfreader,tomjowitt/pdfreader,etherald/pdfreader,pdevty/pdfreader,shvgn/pdfreader,etherald/pdfreader,pdevty/pdfreader,urbnik/pdfreader,cbw1992/pdfreader,tomjowitt/pdfreader,pdevty/pdfreader,shvgn/pdfreader,timhughes/pdfreader,etherald/pdfreader,spitsw/pdfreader,pdevty/pdfreader,billychappell/pdfreader,urbnik/pdfreader,billychappell/pdfreader,billychappell/pdfreader,spitsw/pdfreader,durango/pdfreader,bhanu475/pdfreader,flowlo/pdfread,nathankerr/pdfreader,cbw1992/pdfreader,timhughes/pdfreader,urbnik/pdfreader,timhughes/pdfreader,poorny/pdfreader,timhughes/pdfreader,poorny/pdfreader,poorny/pdfreader,lambdaX/pdfreader,durango/pdfreader,flowlo/pdfread,Lanzafame/pdfreader,shvgn/pdfreader,cbw1992/pdfreader,Lanzafame/pdfreader,spitsw/pdfreader,Lanzafame/pdfreader,bhanu475/pdfreader,nathankerr/pdfreader,tomjowitt/pdfreader,spitsw/pdfreader,bvp/pdfreader,lanfeust21/pdfreader,flowlo/pdfread,bvp/pdfreader,bhanu475/pdfreader,durango/pdfreader,etherald/pdfreader,urbnik/pdfreader,lambdaX/pdfreader,bvp/pdfreader,bvp/pdfreader,bhanu475/pdfreader