More changes to pgtypeslib and set optimization to -O1.

src/interfaces/ecpg/ChangeLog

src/interfaces/ecpg/ecpglib/data.c

src/interfaces/ecpg/ecpglib/execute.c

src/interfaces/ecpg/ecpglib/typename.c

src/interfaces/ecpg/include/datetime.h

src/interfaces/ecpg/include/decimal.h

src/interfaces/ecpg/include/ecpgerrno.h

src/interfaces/ecpg/include/ecpgtype.h

src/interfaces/ecpg/include/pgtypes_interval.h

src/interfaces/ecpg/include/pgtypes_numeric.h

src/interfaces/ecpg/pgtypeslib/Makefile

src/interfaces/ecpg/pgtypeslib/common.c

src/interfaces/ecpg/pgtypeslib/numeric.c

src/interfaces/ecpg/pgtypeslib/timestamp.c

src/interfaces/ecpg/preproc/ecpg.c

src/interfaces/ecpg/preproc/preproc.y

src/interfaces/ecpg/preproc/type.c

src/interfaces/ecpg/test/num_test.pgc