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/handshake_server.cc b/ssl/handshake_server.cc
index 2456d12..f733402 100644
--- a/ssl/handshake_server.cc
+++ b/ssl/handshake_server.cc
@@ -1478,7 +1478,7 @@
     ssl->s3->established_session.reset(ssl->session);
   } else {
     ssl->s3->established_session = std::move(hs->new_session);
-    ssl->s3->established_session->not_resumable = 0;
+    ssl->s3->established_session->not_resumable = false;
   }
 
   hs->handshake_finalized = true;