bcachefs: Improve backpointers error message

the error message here dated from when backpointers could be stored in
alloc keys; now, we should always print the full key.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2023-06-05 01:15:33 -04:00
commit bc166d711d