Derek Foreman authored Jul 16, 2024 and Simon Ser committed Aug 09, 2024

From cleanup commit 0cecde30:
assert()s can be compiled away by #defining NDEBUG. Some build systems
do this. Using wl_abort gives a human readable error message and it
isn't compiled away.

That commit missed one final assert, presumably due to missing it with
grep because of a coding style issue. Fix that up, and remove inclusion
of <assert.h> as appropriate.

Signed-off-by: Derek Foreman <derek.foreman@collabora.com>