- Added some Informix error codes in Informix mode.

src/interfaces/ecpg/ChangeLog

src/interfaces/ecpg/compatlib/informix.c

src/interfaces/ecpg/ecpglib/connect.c

src/interfaces/ecpg/ecpglib/data.c

src/interfaces/ecpg/ecpglib/descriptor.c

src/interfaces/ecpg/ecpglib/error.c

src/interfaces/ecpg/ecpglib/execute.c

src/interfaces/ecpg/ecpglib/memory.c

src/interfaces/ecpg/ecpglib/misc.c

src/interfaces/ecpg/ecpglib/prepare.c

src/interfaces/ecpg/include/ecpgerrno.h

src/interfaces/ecpg/include/ecpglib.h

src/interfaces/ecpg/include/pgtypes_timestamp.h

src/interfaces/ecpg/pgtypeslib/common.c

src/interfaces/ecpg/pgtypeslib/datetime.c

src/interfaces/ecpg/pgtypeslib/dt_common.c

src/interfaces/ecpg/pgtypeslib/extern.h

src/interfaces/ecpg/pgtypeslib/timestamp.c

src/interfaces/ecpg/preproc/ecpg.c

src/interfaces/ecpg/test/dt_test.pgc