added fix to convert_to_svm_node_array from Chen-Tse Tsai from the LibSVM development group
added fix to convert_to_svm_node_array from Chen-Tse Tsai from the LibSVM development group

tomz/libsvm-ruby-swig,tomz/libsvm-ruby-swig,tomz/libsvm-ruby-swig,tomz/libsvm-ruby-swig,tomz/libsvm-ruby-swig,tomz/libsvm-ruby-swig