#246 Reed-Solomon Decoder resizes result if non-syst./dec.failure

[Stephan Ludwig]

As stated in the Forum: https://sourceforge.net/p/itpp/discussion/115656/thread/5172b4b8/
the Reed Solomon decoder resets the size of a vector to wrong size, if a non-systematic code is used and a decoding failure occurs. When decoding subsequent blocks (variable "iterations"), a seg-fault occurs because the vector is accessed out of bounds.

I supply a bug-fix (diff) and try to commit with git.

[Stephan Ludwig]

I created a new branch bug_fix_nr_246; Bogdan, could you please merge this one into master? I anyhow fail to do so. Thanks.

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[x] done alredy by myself.