drm/i915: Initialize active_outputs to never read unitialized values

In case of intel_sdvo_get_active_outputs() failing, we end up reading a
value from the stack.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
1 file changed