My Radeon X1600 has the same behavior. This is consistent with the
vertex shader case in test_uninitialized_varyings with ps3_texcoord_code.
Signed-off-by: Stefan Dösinger <stefan@codeweavers.com>
Signed-off-by: Henri Verbeet <hverbeet@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>