Minor change.

misc/test/src/C++/faust_butterfly_transform2.cpp.in

@@ -45,7 +45,7 @@ int main(int argc, char** argv)
 
 	std::cout << "Faust-dense matrix product OK" << std::endl;
 
-	// test multiplying a MatDense
+	// test multiplying a MatSparse
 	auto spX = MatSparse<FPP, Cpu>::randMat(size, size, .2);
 	//	 X->setOnes();