Change the return type of TransformHelperButterfly<FPP,Cpu>::fourierFaust to...

Change the return type of TransformHelperButterfly<FPP,Cpu>::fourierFaust to parent TransformHelper (does'nt change anything).

src/faust_linear_operator/CPU/faust_TransformHelperButterfly.h

@@ -45,13 +45,13 @@ namespace Faust
 
 
 			public:
-			static TransformHelperButterfly<FPP,Cpu>* fourierFaust(unsigned int n, const bool norma=true);
 			Vect<FPP, Cpu> multiply(const Vect<FPP, Cpu>& x);
 			void multiply(const FPP* x, FPP* y);
 			Vect<FPP,Cpu> multiply(const FPP* x);
 			void multiply(const FPP* A, int A_ncols, FPP* C);
 			MatDense<FPP, Cpu> multiply(const MatDense<FPP,Cpu> &A);
 			MatDense<FPP, Cpu> multiply(const MatSparse<FPP,Cpu> &A);
+			static TransformHelper<FPP,Cpu>* fourierFaust(unsigned int n, const bool norma=true);
 
 		};
 

src/faust_linear_operator/CPU/faust_TransformHelperButterfly.hpp

@@ -29,16 +29,17 @@ namespace Faust
 	}
 
 	template<typename FPP>
-		TransformHelperButterfly<FPP,Cpu>* TransformHelperButterfly<FPP,Cpu>::fourierFaust(unsigned int n, const bool norma)
+		TransformHelper<FPP,Cpu>* TransformHelperButterfly<FPP,Cpu>::fourierFaust(unsigned int n, const bool norma)
 		{
 
 			std::vector<MatGeneric<FPP,Cpu>*> factors(n+1);
-			TransformHelperButterfly<FPP,Cpu>* fourierFaust = nullptr;
+			TransformHelper<FPP,Cpu>* fourierFaust = nullptr;
 			try
 			{
 				fft_factors(n, factors);
 				FPP alpha = norma?FPP(1/sqrt((double)(1 << n))):FPP(1.0);
 				fourierFaust = new TransformHelperButterfly<FPP, Cpu>(factors, alpha, false, false, /* internal call */ true);
+
 			}
 			catch(std::bad_alloc e)
 			{