Curl_timeleft: change return type to timediff_t

returning 'time_t' is problematic when that type is unsigned and we
return values less than zero to signal "already expired", used in
several places in the code.

Closes #2021

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/ssh.c b/lib/ssh.c
index e225ed297..c4a369997 100644
--- a/lib/ssh.c
+++ b/lib/ssh.c
@@ -2833,7 +2833,7 @@ static CURLcode ssh_block_statemach(struct connectdata *conn,
 
   while((sshc->state != SSH_STOP) && !result) {
     bool block;
-    time_t left = 1000;
+    timediff_t left = 1000;
     struct curltime now = Curl_now();
 
     result = ssh_statemach_act(conn, &block);