pgsql: Fix misc typos.

Fix misc typos.

Oskari Saarenmaa. Backpatch to stable branches where applicable.

Branch
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REL9_3_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/658ec626406342211837280a6eb0f836f7d14429

Modified Files
--------------
contrib/btree_gist/btree_ts.c         |    2 +-
contrib/btree_gist/btree_utils_var.c  |    2 +-
src/backend/access/common/heaptuple.c |    2 +-
src/backend/access/gin/ginfast.c      |    4 ++--
src/backend/access/gist/gistproc.c    |    4 ++--
src/backend/access/heap/heapam.c      |    4 ++--
src/backend/optimizer/path/costsize.c |    2 +-
src/backend/utils/adt/regproc.c       |    2 +-
8 files changed, 11 insertions(+), 11 deletions(-)