Fix a bug in matfaust.Faust.get_factor() happening when the Faust is conjugate(-transpose).

It closes issue #16.

misc/test/src/Matlab/test_matlab_faust.m

@@ -726,6 +726,7 @@ end
 for i=1:nb_fact
 	A=get_factor(F_conj,i);
 	if(~isequal(A,conj(factors{i})))
+		conj(factors{i})
         get_factor(F_conj,i)
 		error('get_fact : invalid factor');
 	end
@@ -766,6 +767,7 @@ end
 for i=1:nb_fact
 	A=get_factor(F_ctranspose,i)
 	if(~isequal(A,ctranspose(factors{nb_fact-i+1})))
+		ctranspose(factors{nb_fact-i+1})
         get_factor(F_ctranspose,i)
 		error('get_fact : invalid factor');
 	end

src/faust_linear_operator/CPU/faust_TransformHelper.hpp

@@ -6,7 +6,7 @@ namespace Faust {
 		void conjugate(complex<FPP>* elts, faust_unsigned_int n)
 		{
 			for(faust_unsigned_int i=0; i< n; i++)
-				elts[i] = complex<FPP>(elts[i].real(), elts[i].imag());
+				elts[i] = complex<FPP>(elts[i].real(), - elts[i].imag());
 		}
 
 	template<typename FPP>

wrapper/matlab/tools/faust2Mx.hpp

@@ -383,7 +383,7 @@ mxArray* transformFact2FullMxArray(faust_unsigned_int id, Faust::TransformHelper
 		// cause it needs to be reordered
 		complex<FPP>* src_data_ptr = (complex<FPP>*) malloc(sizeof(complex<FPP>)*dim_sizes[0]*dim_sizes[1]); // TODO: alloc-free in c++ style (new/delete)
 		core_ptr->get_fact(id, src_data_ptr, &num_rows, &num_cols);
-		splitComplexPtr(src_data_ptr, num_cols*num_rows, data_ptr, img_data_ptr, core_ptr->isConjugate());
+		splitComplexPtr(src_data_ptr, num_cols*num_rows, data_ptr, img_data_ptr/*, core_ptr->isConjugate()*/); //let conjugate to false because it's handled internally by get_fact()
 		free(src_data_ptr);
 		// it's different to real transformFact2FullMxArray() case here
 		// because with complex we need to split im/real (until we stop to use separated complex API)
@@ -395,7 +395,8 @@ mxArray* transformFact2FullMxArray(faust_unsigned_int id, Faust::TransformHelper
 		const complex<FPP>* src_data_ptr;
 		//not calling the same prototype of get_fact() called in transpose case (and real version of this function)
 		core_ptr->get_fact(id, &src_data_ptr, &num_rows, &num_cols);
-		splitComplexPtr(src_data_ptr, num_rows*num_cols, data_ptr, img_data_ptr, core_ptr->isConjugate());
+		splitComplexPtr(src_data_ptr, num_rows*num_cols, data_ptr, img_data_ptr, core_ptr->isConjugate());//let conjugate to false because it's handled internally by get_fact()
+
 	}
 	//TODO: matlab 2018 setComplexDoubles()/setComplexSingles() to avoid separating
 	// in real and imaginary part to copy, directly copy into mxArray with get_fact() in the pointer returned by mxComplexSingles()/mxComplexDoubles()