fix like "00" will be paused 12, and check nil val of os.time like os.time(nil)
fix like "00" will be paused 12, and check nil val of os.time like os.time(nil)

when pause a table like {hour="00"}, the paused variable hour will be a mistable value 12, and more, when pass a nil value to os.time(nil), it will report a type error

yuin/gopher-lua,yuin/gopher-lua