Merge branch 'tb/xcurl-off-t'

The xcurl_off_t() helper function is used to cast size_t to
curl_off_t, but some compilers gave warnings against the code to
ensure the casting is done without wraparound, when size_t is
narrower than curl_off_t.  This warning has been squelched.

* tb/xcurl-off-t:
  remote-curl.c: xcurl_off_t is not portable (on 32 bit platfoms)

Author: gitster

remote-curl.c

@@ -617,10 +617,11 @@ static int probe_rpc(struct rpc_state *rpc, struct slot_results *results)
 	return err;
 }
 
-static curl_off_t xcurl_off_t(ssize_t len) {
-	if (len > maximum_signed_value_of_type(curl_off_t))
+static curl_off_t xcurl_off_t(size_t len) {
+	uintmax_t size = len;
+	if (size > maximum_signed_value_of_type(curl_off_t))
 		die("cannot handle pushes this big");
-	return (curl_off_t) len;
+	return (curl_off_t)size;
 }
 
 static int post_rpc(struct rpc_state *rpc)