In particular, if import_dll() skips an unused import, it will return TRUE,
but set *pwm to NULL. This fixes a regression in 3DMark03 version 3.4.0,
introduced by commit 0dd37b02.
Signed-off-by: Henri Verbeet <hverbeet@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>