desktop/output: Clear repaint timer earlier in destroy

The teardown of a sway_output is split in two: begin_destroy and
output_destroy. The former clears some state such as NULL'ing the
reference to wlr_output, while the latter frees the struct and its
remaining resources.

If an output is destroyed while a repaint timer is pending, future frame
callbacks will no longer occur as the listener is torn down in
begin_destroy, but the repaint timer is not torn down and may still
fire until output_destroy is hit. As begin_destroy cleared the reference
to wlr_output, this leads to a NULL-pointer dereference.

Tear down the repaint timer in begin_destroy as there is no need for it.

Fixes: fdc4318ac66d ("desktop/output: Clear frame_pending even output is disabled")
(cherry picked from commit 5312376077254d6431bb92ba22de3840b9933f67)

0 files changed, 0 insertions, 0 deletions