Merge "SurfaceComposerClient: add a range check in setAlpha"

        mStatus = BAD_INDEX;

        return *this;

    }

    if (alpha < 0.0f || alpha > 1.0f) {

        ALOGE("SurfaceComposerClient::Transaction::setAlpha: invalid alpha %f", alpha);

        mStatus = BAD_VALUE;

        return *this;

    }

    s->what |= layer_state_t::eAlphaChanged;

    s->alpha = alpha;