dllist.c

While trying to fix a program of mine (still didn't get there) I came
across:

Dllist *
DLNewList(void)
{       Dllist     *l;
       l = malloc(sizeof(Dllist));       l->dll_head = 0;       l->dll_tail = 0;
       return l;
}

in src/backend/lib/dllist.c, and for a while thought that my problem
had something to do with malloc failing, returning 0, and the next
line trying to write a zero at memory location zero leading to a
segfault. What is the right way of dealing with this? Error message,
or returning NULL a la:

Dllist *
DLNewList(void)
{       Dllist     *l;
       l = (Dllist *)malloc(sizeof(Dllist));       if (l != (Dllist *)NULL) {        l->dll_head = 0;    l->dll_tail =
0;}      return l;
 
}

Again, this wasn't the problem (still looking), but I thought it might
be worth mentioning (same probably applies to DLNewElem()).

Cheers,

Patrick