pgsql: ecpg now adds a unique counter to its varchar struct definitions

Log Message:
-----------
ecpg now adds a unique counter to its varchar struct definitions to make these definitions unique, too. It used to use the linenumber but in the rare case of two definitions in one line this was not unique.

Modified Files:
--------------
pgsql/src/interfaces/ecpg/preproc:
descriptor.c (r1.31 -> r1.32)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/preproc/descriptor.c?r1=1.31&r2=1.32)
ecpg.header (r1.13 -> r1.14)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/preproc/ecpg.header?r1=1.13&r2=1.14)
ecpg.trailer (r1.20 -> r1.21)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/preproc/ecpg.trailer?r1=1.20&r2=1.21)
type.c (r1.87 -> r1.88)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/preproc/type.c?r1=1.87&r2=1.88)
type.h (r1.53 -> r1.54)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/preproc/type.h?r1=1.53&r2=1.54)
variable.c (r1.53 -> r1.54)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/preproc/variable.c?r1=1.53&r2=1.54)
pgsql/src/interfaces/ecpg/test/expected:
preproc-array_of_struct.c (r1.7 -> r1.8)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/expected/preproc-array_of_struct.c?r1=1.7&r2=1.8)
preproc-cursor.c (r1.3 -> r1.4)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/expected/preproc-cursor.c?r1=1.3&r2=1.4)
preproc-variable.c (r1.15 -> r1.16)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/expected/preproc-variable.c?r1=1.15&r2=1.16)
preproc-variable.stderr (r1.10 -> r1.11)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/expected/preproc-variable.stderr?r1=1.10&r2=1.11)
pgsql/src/interfaces/ecpg/test/preproc:
variable.pgc (r1.3 -> r1.4)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/preproc/variable.pgc?r1=1.3&r2=1.4)