Fixed all elog related warnings, as well as a few others.

src/backend/access/common/heaptuple.c

src/backend/access/common/indextuple.c

src/backend/access/gist/gistscan.c

src/backend/access/hash/hashscan.c

src/backend/access/heap/hio.c

src/backend/access/index/istrat.c

src/backend/access/nbtree/nbtinsert.c

src/backend/access/nbtree/nbtscan.c

src/backend/access/nbtree/nbtsort.c

src/backend/access/rtree/rtscan.c

src/backend/bootstrap/bootstrap.c

src/backend/catalog/aclchk.c

src/backend/catalog/catalog.c

src/backend/commands/sequence.c

src/backend/commands/variable.c

src/backend/optimizer/plan/createplan.c

src/backend/optimizer/util/plancat.c

src/backend/parser/analyze.c

src/backend/parser/gram.y

src/backend/parser/parse_node.c