Fix a memory leak

When we call tls_collect_extensions() we need to free up the raw
extensions data later.

Perl changes reviewed by Richard Levitte. Non-perl changes reviewed by Rich
Salz
Reviewed-by: NRich Salz <rsalz@openssl.org>
Reviewed-by: NRichard Levitte <levitte@openssl.org>

ssl/statem/statem_clnt.c

@@ -1352,10 +1352,12 @@ MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt)
         goto f_err;
     }
 
+    OPENSSL_free(extensions);
     return MSG_PROCESS_CONTINUE_READING;
  f_err:
     ssl3_send_alert(s, SSL3_AL_FATAL, al);
     ossl_statem_set_error(s);
+    OPENSSL_free(extensions);
     return MSG_PROCESS_ERROR;
 }
 
@@ -3117,11 +3119,13 @@ static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL *s, PACKET *pkt)
                                          rawexts, &al))
         goto err;
 
+    OPENSSL_free(rawexts);
     return MSG_PROCESS_CONTINUE_READING;
 
  err:
     ssl3_send_alert(s, SSL3_AL_FATAL, al);
     ossl_statem_set_error(s);
+    OPENSSL_free(rawexts);
     return MSG_PROCESS_ERROR;
 }