Fix the error code for SSL_get_async_wait_fd()

0 is a valid file descriptor so SSL_get_async_wait_fd should instead return
-1 on error.

Reviewed-by: Rich Salz <rsalz@openssl.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/ssl/ssl_lib.c b/ssl/ssl_lib.c
index 55b64bbcb1..936e84b120 100644
--- a/ssl/ssl_lib.c
+++ b/ssl/ssl_lib.c
@@ -934,7 +934,7 @@ int SSL_waiting_for_async(SSL *s)
 int SSL_get_async_wait_fd(SSL *s)
 {
     if (!s->job)
-        return 0;
+        return -1;
 
     return ASYNC_get_wait_fd(s->job);
 }