pgsql: Change TupleTableSlot->tts_nvalid to type AttrNumber.

Change TupleTableSlot->tts_nvalid to type AttrNumber.

Previously it was an int / 4 bytes. The maximum number of attributes
in a tuple is restricted by the maximum value Var->varattno, which is
an AttrNumber/int16. Hence use the same data type for
TupleTableSlot->tts_nvalid.

Author: Ashutosh Bapat
Discussion: https://postgr.es/m/20180220224318.gw4oe5jadhpmcdnm@alap3.anarazel.de

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/a598708ffa8eb72a22eeee4e6f30bc26e4984acd

Modified Files
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src/backend/jit/llvm/llvmjit_deform.c | 4 ++--
src/backend/jit/llvm/llvmjit_expr.c   | 2 +-
src/include/executor/tuptable.h       | 2 +-
3 files changed, 4 insertions(+), 4 deletions(-)