RELEASE revision 3f54fd611f536639ec30dd53c48e5ec1897cc7d9
b035f7920938e52716cdbdd3cff369f734f028cfSungbae Yoo07-09-22 prevent cl_block()'s on multiple sync()'s
b035f7920938e52716cdbdd3cff369f734f028cfSungbae Yoo04-02-19 snarf from libz/sfdclzw.c