Re: Fix overflow in DecodeInterval

I wrote:
> Cool.  I've pushed the patch.

Hmm ... buildfarm's not entirely happy [1][2][3]:

diff -U3 /home/nm/farm/gcc64/HEAD/pgsql.build/src/test/regress/expected/interval.out
/home/nm/farm/gcc64/HEAD/pgsql.build/src/test/regress/results/interval.out
--- /home/nm/farm/gcc64/HEAD/pgsql.build/src/test/regress/expected/interval.out    2022-04-03 04:56:32.000000000 +0000
+++ /home/nm/farm/gcc64/HEAD/pgsql.build/src/test/regress/results/interval.out    2022-04-03 05:23:00.000000000 +0000
@@ -1465,7 +1465,7 @@
  LINE 1: select interval 'PT2562047788.1:00:54.775807';
                          ^
  select interval 'PT2562047788:01.:54.775807';
- ERROR:  interval field value out of range: "PT2562047788:01.:54.775807"
+ ERROR:  invalid input syntax for type interval: "PT2562047788:01.:54.775807"
  LINE 1: select interval 'PT2562047788:01.:54.775807';
                          ^
  -- overflowing with fractional fields - SQL standard format

What do you make of that?  I'm betting that strtod() works a
bit differently on those old platforms, but too tired to
look closer tonight.

            regards, tom lane

[1] https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=sungazer&dt=2022-04-03%2004%3A56%3A34
[2] https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=hoverfly&dt=2022-04-03%2000%3A51%3A50
[3] https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=anole&dt=2022-04-03%2000%3A32%3A10