Instead of doing basically nothing, this call completely mislaid out the
control as -1 were used used literally instead of meaning "use the
current geometry", as they're supposed to. Fix this by handling
arguments with the value of -1 specially.
Such call was done by wxCompositeWindow::SetLayoutDirection() used by
the widgets sample and explained why the slider couldn't be seen when
switching to its page in this sample.
Closes#18442.
ed57a9ab7b