pgsql: Fix JITed EEOP_AGG_INIT_TRANS, which missed some state.

Fix JITed EEOP_AGG_INIT_TRANS, which missed some state.

The JIT compiled implementation missed maintaining
AggState->{current_set,curaggcontext}. That could lead to trouble
because the transition value could be allocated in the wrong context.

Reported-By: Rushabh Lathia
Diagnosed-By: Dmitry Dolgov
Author: Dmitry Dolgov, with minor changes by me
Discussion: https://postgr.es/m/CAGPqQf165-=+Drw3Voim7M5EjHT1zwPF9BQRjLFQzCzYnNZEiQ@mail.gmail.com
Backpatch: 11-, where JIT compilation support was added

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/6b4d860311e99621681f25db5db82f88348d8ea6

Modified Files
--------------
src/backend/jit/llvm/llvmjit_expr.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)