Flip SSL_SESSION fields to bool.

Change-Id: I0a3648437f78f37a4b710aaea73084a19be607c5
Reviewed-on: https://boringssl-review.googlesource.com/29485
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: Adam Langley <agl@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
diff --git a/ssl/tls13_client.cc b/ssl/tls13_client.cc
index b8bd546..317b4d3 100644
--- a/ssl/tls13_client.cc
+++ b/ssl/tls13_client.cc
@@ -891,8 +891,8 @@
     }
   }
 
-  session->ticket_age_add_valid = 1;
-  session->not_resumable = 0;
+  session->ticket_age_add_valid = true;
+  session->not_resumable = false;
 
   if ((ssl->session_ctx->session_cache_mode & SSL_SESS_CACHE_CLIENT) &&
       ssl->session_ctx->new_session_cb != NULL &&