What - refien the rang parameter for get function
What - refien the rang parameter for get function

@Description/root cause - Why
Issue 2: 	Build error ,wrong type: curl_off_t
1. it will show error on some systems, we need to use CURL_FORMAT_OFF_T as format
of off_t

@Resolution - How
1. change range parameter from
"%lld-%lld"
to
CURL_FORMAT_OFF_T "-" CURL_FORMAT_OFF_T
otherwise, it will show compile error on some systems.

@Reviewer
None

@Tickets
http://code.google.com/p/kpfs/issues/detail?id=2

mimepp/kpfs,mimepp/kpfs