Pass attypmod through to executor by adding to Var and Resdom.

src/backend/access/common/printtup.c

src/backend/access/common/tupdesc.c

src/backend/commands/creatinh.c

src/backend/commands/recipe.c

src/backend/commands/view.c

src/backend/executor/execMain.c

src/backend/executor/execTuples.c

src/backend/executor/execUtils.c

src/backend/executor/nodeGroup.c

src/backend/executor/nodeUnique.c

src/backend/executor/spi.c

src/backend/libpq/be-dumpdata.c

src/backend/nodes/copyfuncs.c

src/backend/nodes/equalfuncs.c

src/backend/nodes/makefuncs.c

src/backend/nodes/outfuncs.c

src/backend/nodes/readfuncs.c

src/backend/optimizer/plan/createplan.c

src/backend/optimizer/plan/initsplan.c

src/backend/optimizer/plan/planmain.c