PgSQL 8.0.0 beta1 compile problem + patch

Hi all.

Ran into a minor showstopper. Sometimes, my CC is just too much of a
nitpick, but on this matter, I agree with it. "./src/timezone/zic.c" has
a mismatch in declaration and definition of "memcheck(...)" function. My
CC beltched on it (I was running it in strict ANSI mode). The diference
is this:

static char *memcheck(char *tocheck);
...
/*
* Memory allocation.
*/

static char *
memcheck(ptr)
char *const ptr;
{
if (ptr == NULL)
{
const char *e = strerror(errno);

(void) fprintf(stderr, _("%s: Memory exhausted: %s\n"),
progname, e);
(void) exit(EXIT_FAILURE);
}
return ptr;
}

Notice "char *const ptr". Trusting that the lower definition is correct,
being more strict and closer to the actual code, I have changed the uper
declaration to match. I have attached a patch.

Nix.