Hi,
Uninitialized variable 'dtype' warning in date_in() is fix[1] on branch 9.3 & above, but not for 9.2 & older branches. I guess this should be back-patch.
[1] commit link=> http://git.postgresql.org/pg/commitdiff/5c45d2f87835ccd3ffac338845ec79cab1b31a11
Regards,
Amul Sul