6435779 6433679 broke zpool import

[eric.schr...@sun.com]

Author: eschrock
Repository: /hg/onnv/onnv-gate
Revision: 2df97b3cea4d22a697e437fba40b0e4e263e79b3
Log message:
6435779 6433679 broke zpool import

Files:
        update: usr/src/lib/libzfs/common/libzfs_import.c