MFV r261619:

4574 get_clones_stat does not call zap_count in non-debug kernel

zap_count(...) is never called in non-DEBUG kernel.
As result "count" variable is always 0, and "goto fail" is always
reached.  This means get_clones_stat function never makes up list
of clones for "clones" properties.

MFC after:	2 weeks