Fix a bug introduced by 0ac2f190 which happens when X (in F*X) has more than one column.

src/faust_linear_operator/CPU/faust_TransformHelperPoly.hpp

@@ -304,11 +304,11 @@ namespace Faust
 			auto K_plus_1 = K+1;
 			auto d_K_plus_1 = d*K_plus_1;
 			//			#pragma omp parallel for // most likely counterproductive to use OpenMP here, Eigen is already multithreading scalar product in the loop
+			Eigen::Map<Eigen::Matrix<FPP, Eigen::Dynamic, Eigen::Dynamic>> vec_out(out, d, n);
 			for(int i=0;i<n;i++)
 			{
 				Eigen::Map<Eigen::Matrix<FPP, Eigen::Dynamic, Eigen::Dynamic>> mat_basisX(const_cast<FPP*>(basisX+d_K_plus_1*i), d, K_plus_1); //constcast is not dangerous, no modification is done later
 				Eigen::Map<Eigen::Matrix<FPP, Eigen::Dynamic, 1>> vec_coeffs(const_cast<FPP*>(coeffs), K_plus_1);
-				Eigen::Map<Eigen::Matrix<FPP, Eigen::Dynamic, 1>> vec_out(out, K_plus_1);
 				vec_out.block(0,i,d,1) = mat_basisX*vec_coeffs;
 			}
 		}