Add missing state to DTLS state machine.

This was a mistake from when we added async CertificateVerify support.
No test because the final state of each write state is semi-unreachable
due to the buffer BIO that gets installed on each handshake.

Change-Id: I0180926522113c8b1ca58b8c9c6dc37fb0dd8083
Reviewed-by: Adam Langley <>
diff --git a/ssl/d1_clnt.c b/ssl/d1_clnt.c
index 7924598..b86655c 100644
--- a/ssl/d1_clnt.c
+++ b/ssl/d1_clnt.c
@@ -345,6 +345,7 @@
       case SSL3_ST_CW_CERT_VRFY_A:
       case SSL3_ST_CW_CERT_VRFY_B:
+      case SSL3_ST_CW_CERT_VRFY_C:
         ret = ssl3_send_cert_verify(s);
         if (ret <= 0) {