OSV-2020-2253 Global-buffer-overflow in g_date_time_get_ymd

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=28477 Crash type: Global-buffer-overflow READ 2 Crash state: gdatetimegetymd gdatetimegetyear gdatetimeformatutf8...