Memory leak in state machine in error path

When EC is disabled, and an error occurs in ssl_generate_master_secret()
or RAND_bytes(), the error path does not free rsa_decrypt.

RT#4197
Reviewed-by: NRichard Levitte <levitte@openssl.org>
Reviewed-by: NMatt Caswell <matt@openssl.org>

ssl/statem/statem_srvr.c

@@ -2620,8 +2620,8 @@ MSG_PROCESS_RETURN tls_process_client_key_exchange(SSL *s, PACKET *pkt)
 #endif
 #ifndef OPENSSL_NO_EC
     EVP_PKEY_free(ckey);
-    OPENSSL_free(rsa_decrypt);
 #endif
+    OPENSSL_free(rsa_decrypt);
 #ifndef OPENSSL_NO_PSK
     OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen);
     s->s3->tmp.psk = NULL;