Fix buffer offset in pstore_extent__decompress()
Fix buffer offset in pstore_extent__decompress()

Fix up buffer usage in pstore_extent__decompress(). The buffer API needs a
cleanup especially wrt. 'size' and 'capacity' handling.

Signed-off-by: Pekka Enberg <add4fcd06328a394f0ad91feda7ee057316dc5ed@cs.helsinki.fi>

penberg/pstore,penberg/pstore,penberg/pstore,penberg/pstore