flexfax: configure error w/ sunpro compiler

["Taso N. Devetzis" <devetzis@snet.net>]

the configure script using the sunpro compilers under solaris 7 (and
probably other versions) fails with the error described in this
message:

     http://www.hylafax.org/archive/1997-03/msg00186.html

it's a bug in the configure script.  the following patch fixes it.

regards,
/taso

*** configure-	Mon Jul 26 10:57:29 1999
--- configure	Thu Sep 16 19:04:15 1999
***************
*** 1324,1330 ****
  #
  CheckForCXXRuntime()
  {
! cat>t.c++<<EOF
  #include "iostream.h"
  int main(){ cout << "Hello World!" << endl; return 0;}
  EOF
--- 1324,1330 ----
  #
  CheckForCXXRuntime()
  {
! cat>t.c++${MAKECXXOVERRIDE}<<EOF
  #include "iostream.h"
  int main(){ cout << "Hello World!" << endl; return 0;}
  EOF