🚀 go-pugleaf

Here is a patch to the makeinfo.c that appeared in the texinfo2.tar.Z file
on prep.ai.mit.edu recently. This avoids indirecting through a NULL pointer,
which causes SIGSEVs in programs built on a DG AviioN (unless you twiddle
the way the defaults for the linker work).

"makeinfo +version" reports the version number as 1.0, so I wonder about the
accuracy of the version number as well.

*** makeinfo.c.orig	Wed Feb 20 11:33:48 1991
--- makeinfo.c	Thu Feb 21 11:17:31 1991
***************
*** 4845,4851 ****
       a simple @@ followed immediately by more text.  If this is the case,
       then the next defun arg is part of this one, and we should concatenate
       them. */
!   if (**scan_args && !whitespace (**scan_args) &&
        (strcmp (defined_name, "@@") == 0))
      {
        char *tem = (char *)xmalloc (3 + strlen (scan_args[0]));
--- 4845,4851 ----
       a simple @@ followed immediately by more text.  If this is the case,
       then the next defun arg is part of this one, and we should concatenate
       them. */
!   if (*scan_args && **scan_args && !whitespace (**scan_args) &&
        (strcmp (defined_name, "@@") == 0))
      {
        char *tem = (char *)xmalloc (3 + strlen (scan_args[0]));

This particular bug crops up attempting to run makeinfo on the texinfo2.texi
file that comes in the same package with the makeinfo.c program.
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