bug fix k-mer length was not read properly from user input

src/ROCKparams.cpp

@@ -291,6 +291,7 @@ void ROCKparams::initFromMainOptsArgs(int argc,char ** argv) {
                     cout<<"Bad value for k. Must choose k so that 0<k<=32."<<endl;
                     usage(EXIT_FAILURE);
                 }
+		qual_thres.k=k;
                 break;
             case 'n':
                 nb_k_mers=atoi(optarg);break; // number of distinct k-mers