Always use session_ctx when removing a session

Sessions are stored on the session_ctx, which doesn't change after
SSL_set_SSL_CTX().

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

ssl/s3_msg.c

diff --git a/ssl/s3_msg.c b/ssl/s3_msg.c
index 78ae099..185f0e9 100644
--- a/ssl/s3_msg.c
+++ b/ssl/s3_msg.c
@@ -72,7 +72,7 @@
         return -1;
     /* If a fatal one, remove from cache */
     if ((level == SSL3_AL_FATAL) && (s->session != NULL))
-        SSL_CTX_remove_session(s->ctx, s->session);
+        SSL_CTX_remove_session(s->session_ctx, s->session);
 
     s->s3->alert_dispatch = 1;
     s->s3->send_alert[0] = level;