drm/i915: Initialize active_outputs to never read unitialized values
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 <64bd3cb94f359c1a3ce68dae5e26b40578526277@intel.com>
Signed-off-by: Daniel Vetter <c1b6782c4af8f0673da8923a0702a1832e5940f4@ffwll.ch>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs