Fix issue #263 compiling error of TransformHelper GPU2.

src/faust_linear_operator/GPU2/faust_Transform_gpu.h

@@ -104,6 +104,7 @@ namespace Faust
 			typename Transform<FPP,GPU2>::iterator end() const;
 
 			friend TransformHelper<FPP,GPU2>;
+			friend TransformHelperGen<FPP,GPU2>;
 		};
 }
 

src/faust_linear_operator/faust_TransformHelperGen.h

@@ -80,9 +80,9 @@ namespace Faust
 */
 			virtual TransformHelper<FPP,DEV>* right(const faust_unsigned_int id, const bool copy=false) const;
 
-			void copy_slices(const TransformHelper<FPP,DEV>* th, const bool transpose = false);
-			void copy_slice_state(const TransformHelper<FPP,DEV>& th, bool transpose=false);
-			void copy_fancy_idx_state(const TransformHelper<FPP, DEV> &th, bool transpose=false);
+			void copy_slices(const TransformHelperGen<FPP,DEV>* th, const bool transpose = false);
+			void copy_slice_state(const TransformHelperGen<FPP,DEV>& th, bool transpose=false);
+			void copy_fancy_idx_state(const TransformHelperGen<FPP, DEV> &th, bool transpose=false);
 			void copy_transconj_state(const TransformHelper<FPP,DEV>& th);
 			virtual void copy_mul_mode_state(const TransformHelper<FPP,DEV>& th);
 			void copy_state(const TransformHelper<FPP,DEV>& th);

src/faust_linear_operator/faust_TransformHelperGen.hpp

@@ -302,7 +302,7 @@ namespace Faust
 		}
 
 	template<typename FPP, FDevice DEV>
-		void TransformHelperGen<FPP, DEV>::copy_slices(const TransformHelper<FPP, DEV> *th, const bool transpose /*=false*/)
+		void TransformHelperGen<FPP, DEV>::copy_slices(const TransformHelperGen<FPP, DEV> *th, const bool transpose /*=false*/)
 		{
 			if(transpose)
 			{
@@ -316,7 +316,7 @@ namespace Faust
 		}
 
 	template<typename FPP, FDevice DEV>
-		void TransformHelperGen<FPP,DEV>::copy_slice_state(const TransformHelper<FPP,DEV>& th, bool transpose /*=false*/)
+		void TransformHelperGen<FPP,DEV>::copy_slice_state(const TransformHelperGen<FPP,DEV>& th, bool transpose /*=false*/)
 		{
 			this->is_sliced = th.is_sliced;
 			if(th.is_sliced)
@@ -324,7 +324,7 @@ namespace Faust
 		}
 
 	template<typename FPP, FDevice DEV>
-		void TransformHelperGen<FPP,DEV>::copy_fancy_idx_state(const TransformHelper<FPP,DEV>& th, bool transpose /*=false*/)
+		void TransformHelperGen<FPP,DEV>::copy_fancy_idx_state(const TransformHelperGen<FPP,DEV>& th, bool transpose /*=false*/)
 		{
 			this->is_fancy_indexed = th.is_fancy_indexed;
 			if(th.is_fancy_indexed)