second newterm with sp_funcs enabled returns NULL pointer

[Thomas Beierlein]

Hi,

I am maintaining an old ncurses program for some years (tlf) which uses
two terminal screens. Last days I got a bug report that the second
screen does not work in OpenSUSE environment. A quick check showed that
libncurses (5.9) got build there with --enable-sp-funcs. Digging a
little further only a first call to newterm() returns a valid SCREEN*,
a second call to establish a second terminal screen always returns
NULL. 

That can also be shown by the following simple program:

-- 
#include <ncurses.h>
SCREEN *x;
SCREEN *y;

int main() {
 x = newterm(NULL, stdout, stdin);
 y = newterm(NULL, stdout, stdin);
 return 0;
}
--

x is correctly initialized, but y is NULL in the end.

I did some search on the net and also had a first look into the code -
but sorry I do not get it. The use of the sp-funcs is not really well
documented. Any ideas or pointers are welcome.

Thanks,
        Thomas.

-- 
"Do what is needful!"
Ursula LeGuin: Earthsea
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