init PutRet and check null before print it
Merge pull request #88 from carter2000/feature/b_jwl_fix_uninitialised_PutRet

init PutRet and check null before print it
cast time_t to uint32 and print it with %u
use unsigned int
Merge pull request #90 from carter2000/feature/b_jwl_cast_time_t_2_uint32

cast time_t to uint32 and print it with %u
Update CHANGELOG.md
Merge pull request #91 from qiniu/develop

Release v6.1.1