drm/atomic: Add missing ERR_PTR casting
drm/atomic: Add missing ERR_PTR casting

This is an oversight from

commit f52b69f1ecfdd7ef6867a257620258c09e569552
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Wed Nov 19 18:38:08 2014 +0100

    drm/atomic: Don't overrun the connector array when hotplugging

Cc: Dave Airlie <f2295d84e358395675bc8031be58672073ae065e@redhat.com>
Cc: Rob Clark <915c10c999604870200b6defbe633d857c856ca0@gmail.com>
Signed-off-by: Daniel Vetter <c1b6782c4af8f0673da8923a0702a1832e5940f4@intel.com>
Reviewed-by: Thierry Reding <3055038c414aef68bf32c33b8118623e7554e0f2@nvidia.com>
Signed-off-by: Dave Airlie <f2295d84e358395675bc8031be58672073ae065e@redhat.com>

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