$NetBSD$

Explicitly check isastream(3) for SVR4 in libspt.c.

--- config.h.in.orig	2003-12-12 09:09:00.000000000 +0000
+++ config.h.in
@@ -45,6 +45,9 @@
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H
 
+/* Define to 1 if you have the `isastream' function. */
+#undef HAVE_ISASTREAM
+
 /* Define to 1 if you have the <lastlog.h> header file. */
 #undef HAVE_LASTLOG_H