BUILD: fix build error without SSL (ssl_cert)

One last-minute optimization broke the build without SSL support.
Move ssl_cert out of the #ifdef/#endif and it's OK.
diff --git a/include/types/protocols.h b/include/types/protocols.h
index 4e40a67..b075ef6 100644
--- a/include/types/protocols.h
+++ b/include/types/protocols.h
@@ -130,8 +130,8 @@
 	char *interface;		/* interface name or NULL */
 	int maxseg;			/* for TCP, advertised MSS */
 
-#ifdef USE_OPENSSL
 	char *ssl_cert;			/* ssl certificate */
+#ifdef USE_OPENSSL
 	struct {
 		SSL_CTX *ctx;
 		char *ciphers;		/* cipher suite to use if non-null */