Move MatSparse<FPP, GPU2> from .cpp.in to hpp file because it's not a template specialization.

src/faust_linear_operator/GPU2/faust_MatSparse_gpu.cpp.in

@@ -292,19 +292,6 @@ namespace Faust
 			delete [] colids2;
 		}
 
-	template<typename FPP>
-		MatGeneric<FPP,GPU2>* MatSparse<FPP,GPU2>::Clone(const bool isOptimize /*default value=false*/) const
-		{
-			if (isOptimize)
-			{
-				Faust::MatDense<FPP,GPU2> M((*this));
-				return optimize(M,(*this));
-			} else
-			{
-				return new Faust::MatSparse<FPP,GPU2>((*this));
-			}
-		}
-
 	template<>
 		MatSparse<@FAUST_SCALAR_FOR_GM@, GPU2>* MatSparse<@FAUST_SCALAR_FOR_GM@, GPU2>::clone(const int32_t dev_id/*=-1*/, const void* stream/*=nullptr*/) const
 	{

src/faust_linear_operator/GPU2/faust_MatSparse_gpu.hpp

-template<typename FPP>
-template<typename FPP2>
-Faust::MatSparse<Real<FPP2>, GPU2> Faust::MatSparse<FPP,GPU2>::to_real() const
-{
-	//TODO: should be done directly in GPU memory in gpu_mod (optimization)
-	MatSparse<FPP, Cpu> cpu_smat;
-	auto ffp2_cpu_smat = cpu_smat.template to_real<Real<FPP2>>();
-	MatSparse<Real<FPP2>, GPU2> ffp2_gpu_smat(ffp2_cpu_smat);
-	return ffp2_gpu_smat;
+namespace Faust {
+	template<typename FPP>
+		MatGeneric<FPP,GPU2>* MatSparse<FPP,GPU2>::Clone(const bool isOptimize /*default value=false*/) const
+		{
+			if (isOptimize)
+			{
+				Faust::MatDense<FPP,GPU2> M((*this));
+				return optimize(M,(*this));
+			} else
+			{
+				return new Faust::MatSparse<FPP,GPU2>((*this));
+			}
+		}
+
+	template<typename FPP>
+		template<typename FPP2>
+		Faust::MatSparse<Real<FPP2>, GPU2> Faust::MatSparse<FPP,GPU2>::to_real() const
+		{
+			//TODO: should be done directly in GPU memory in gpu_mod (optimization)
+			MatSparse<FPP, Cpu> cpu_smat;
+			auto ffp2_cpu_smat = cpu_smat.template to_real<Real<FPP2>>();
+			MatSparse<Real<FPP2>, GPU2> ffp2_gpu_smat(ffp2_cpu_smat);
+			return ffp2_gpu_smat;
+		}
 }