$NetBSD$

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

--- configure.orig	2003-12-12 09:09:41.000000000 +0000
+++ configure
@@ -9035,7 +9035,7 @@ fi
 
 
 
-for ac_func in dup2 ftruncate gettimeofday select strcspn strstr strchr memcpy bzero setutent setutxent updwtmp updwtmpx _openpty revoke getsid setsid setpgrp snprintf sigaction cfmakeraw
+for ac_func in dup2 ftruncate gettimeofday select strcspn strstr strchr memcpy bzero setutent setutxent updwtmp updwtmpx _openpty revoke getsid setsid setpgrp snprintf sigaction cfmakeraw isastream
 do
 as_ac_var=`echo "ac_cv_func_$ac_func" | $as_tr_sh`
 echo "$as_me:$LINENO: checking for $ac_func" >&5
