__fscache_check_consistency() calls check_consistency() callback
and return the callback's return value. But the return type of
check_consistency() is bool. So __fscache_check_consistency()
return 1 if the cache is inconsistent. This is inconsistent with
the document.
Signed-off-by: NYan, Zheng <zyan@redhat.com>
Acked-by: NDavid Howells <dhowells@redhat.com>