mat: don't assign unused value
@@ -1467,7 +1467,7 @@ func testTwoInput(t *testing.T,
// Ensure that b is the correct transpose type if applicable.
// The receiver is always a concrete type so use it.
bSame := receiver
- u, ok = b.(Untransposer)
+ _, ok = b.(Untransposer)
if ok {
bSame = retranspose(b, receiver)
}
