pgsql-server: - Only use typedefs inside their scope.

Log Message:
-----------
- Only use typedefs inside their scope.
- Variables that are out of scope, were not removed all the time.
- Make a varchar NULL set everything to 0 when not using indicators.

Tags:
----
REL7_4_STABLE

Modified Files:
--------------
pgsql-server/src/interfaces/ecpg/ecpglib:
misc.c (r1.16.2.1 -> r1.16.2.2)
(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/interfaces/ecpg/ecpglib/misc.c.diff?r1=1.16.2.1&r2=1.16.2.2)
pgsql-server/src/interfaces/ecpg/preproc:
extern.h (r1.57.4.2 -> r1.57.4.3)
(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/interfaces/ecpg/preproc/extern.h.diff?r1=1.57.4.2&r2=1.57.4.3)
preproc.y (r1.263.2.16 -> r1.263.2.17)
(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/interfaces/ecpg/preproc/preproc.y.diff?r1=1.263.2.16&r2=1.263.2.17)
type.h (r1.40 -> r1.40.4.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/interfaces/ecpg/preproc/type.h.diff?r1=1.40&r2=1.40.4.1)
variable.c (r1.27.2.5 -> r1.27.2.6)
(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/interfaces/ecpg/preproc/variable.c.diff?r1=1.27.2.5&r2=1.27.2.6)