BUG #19405: Assertion in eval_windowaggregates() fails due to integer overflow

The following bug has been logged on the website:

Bug reference:      19405
Logged by:          Alexander Lakhin
Email address:      exclusion@gmail.com
PostgreSQL version: 18.2
Operating system:   Ubuntu 24.04
Description:

The following script:
CREATE TABLE t (i integer);
INSERT INTO t SELECT g FROM generate_series(1, 2) g;
SELECT SUM(i) OVER (ROWS BETWEEN 1 PRECEDING AND 0x7fffffffffffffff
FOLLOWING EXCLUDE CURRENT ROW) FROM t;

triggers:
TRAP: failed Assert("aggregatedupto_nonrestarted <=
winstate->aggregatedupto"), File: "nodeWindowAgg.c", Line: 1024, PID:
3288248
ExceptionalCondition at assert.c:51:13
eval_windowaggregates at nodeWindowAgg.c:1061:31
ExecWindowAgg at nodeWindowAgg.c:2367:5
ExecProcNode at executor.h:320:1
ExecutePlan at execMain.c:1711:10
standard_ExecutorRun at execMain.c:366:3
...

Reproduced on REL_14_STABLE .. master.