Curl_read() uses ssize_t now

CURLcode static

_Transfer(struct connectdata *c_conn)

{

  size_t nread;                 /* number of bytes read */

  ssize_t nread;                /* number of bytes read */

  int bytecount = 0;            /* total number of bytes read */

  int writebytecount = 0;       /* number of bytes written */

  long contentlength=0;         /* size of incoming data */