Bug: https://bugs.gentoo.org/638596

--- a/src/nnet/matrix.cc
+++ b/src/nnet/matrix.cc
@@ -63,7 +63,7 @@
 template<class T> void CMatrix<T>::multiplyByTransponed (const CMatrix &y, CMatrix &retval)
 {
 	int i,j,k;
-	assert (cols == y.cols);
+	this->assert (cols == y.cols);
 	if (cols != y.cols) { retval.Realloc (0,0); return; }
 
 	T sum;
@@ -80,7 +80,7 @@
 template<class T> void CMatrix<T>::transponedMultiply (const CMatrix &y, CMatrix &retval)
 {
 	int i,j,k;
-	assert (rows == y.rows);
+	this->assert (rows == y.rows);
 	if (rows != y.rows) { retval.Realloc (0,0); return; }
 
 	T sum;