sctp: if SCTP support not compiled, next_proto() shouldn't return SCTP

- minor fix: if no SCTP support was compiled, init_proto_order() didn't
 remove PROTO_SCTP references and this caused a BUG message on ser start

socket_info.c

@@ -1458,11 +1458,11 @@ void init_proto_order()
 		}
 #ifdef USE_SCTP
 	if (sctp_disable)
+#endif
 		for(r=PROTO_NONE; r<=PROTO_LAST; r++){
 			if (nxt_proto[r]==PROTO_SCTP)
 				nxt_proto[r]=nxt_proto[PROTO_SCTP];
 		}
-#endif
 }