pgsql: Made sure sqlca is reset for declare cursor in Informix mode as

Log Message:
-----------
Made sure sqlca is reset for declare cursor in Informix mode as pointed out by
Bszrmnyi Zoltn <zb(at)cybertec(dot)at>.

Modified Files:
--------------
pgsql/src/interfaces/ecpg:
ChangeLog (r1.397 -> r1.398)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/ChangeLog?r1=1.397&r2=1.398)
pgsql/src/interfaces/ecpg/compatlib:
Makefile (r1.44 -> r1.45)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/compatlib/Makefile?r1=1.44&r2=1.45)
exports.txt (r1.4 -> r1.5)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/compatlib/exports.txt?r1=1.4&r2=1.5)
informix.c (r1.59 -> r1.60)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/compatlib/informix.c?r1=1.59&r2=1.60)
pgsql/src/interfaces/ecpg/include:
ecpg_informix.h (r1.22 -> r1.23)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/include/ecpg_informix.h?r1=1.22&r2=1.23)
pgsql/src/interfaces/ecpg/preproc:
ecpg.addons (r1.4 -> r1.5)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/preproc/ecpg.addons?r1=1.4&r2=1.5)
ecpg.trailer (r1.10 -> r1.11)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/preproc/ecpg.trailer?r1=1.10&r2=1.11)
pgsql/src/interfaces/ecpg/test/compat_informix:
test_informix.pgc (r1.5 -> r1.6)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/compat_informix/test_informix.pgc?r1=1.5&r2=1.6)
pgsql/src/interfaces/ecpg/test/expected:
compat_informix-test_informix.c (r1.18 -> r1.19)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/expected/compat_informix-test_informix.c?r1=1.18&r2=1.19)
compat_informix-test_informix.stderr (r1.14 -> r1.15)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/expected/compat_informix-test_informix.stderr?r1=1.14&r2=1.15)
compat_informix-test_informix.stdout (r1.6 -> r1.7)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/expected/compat_informix-test_informix.stdout?r1=1.6&r2=1.7)
connect-test1.stderr (r1.15 -> r1.16)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/expected/connect-test1.stderr?r1=1.15&r2=1.16)