Fix convertToFenceHandle()

... to not return address to a local stack variable.

Noticed by dustingreen@

Bug: b/287536665
Test: cvd start && vts -m VtsHalGraphicsMapperV4_0Target
Change-Id: Iba486270a7ae3f8fbe50b41e3ea4c32aa0c4acad
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/minigbm/+/4615434
Reviewed-by: Yiwei Zhang <zzyiwei@chromium.org>
Auto-Submit: Jason Macnak <natsu@google.com>
Tested-by: Jason Macnak <natsu@google.com>
Commit-Queue: Jason Macnak <natsu@google.com>
3 files changed