parse-date: fix printf format

warning on 32bit systems:
../lib/parse-date.y: In function 'parse_date':
../lib/parse-date.y:1509:7: warning: format '%ld' expects argument of type 'long int', but argument 4 has type 'intmax_t' [-Wformat=]
       abs_time_zone_min);
       ^

Signed-off-by: Ruediger Meier <ruediger.meier@ga-group.nl>
1 file changed