Draw rects are derived from the current viewport. It is possible to produce a
clear operation with a draw rect which lies completely outside of one of render
targets in D3D9.

It seems that we never use the CPU blitter for D3D9 render target clears, so it
might not be a problem in practice.
Signed-off-by: Józef Kucia <jkucia@codeweavers.com>
Signed-off-by: Henri Verbeet <hverbeet@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>