libpqtypes - libpqtypes: made PQputf auto-fill unset composite fields

Log Message:
-----------
made PQputf auto-fill unset composite fields with SQL NULLs (it used to error). The error still occurs but only if the number of params exceeds the number of composite fields. Auto-filling occurs when the number of params falls short. Updated ChangeLog.

Modified Files:
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libpqtypes:
ChangeLog (r1.24 -> r1.25)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/libpqtypes/libpqtypes/ChangeLog.diff?r1=1.24&r2=1.25)
libpqtypes/src:
libpqtypes-int.h (r1.12 -> r1.13)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/libpqtypes/libpqtypes/src/libpqtypes-int.h.diff?r1=1.12&r2=1.13)
param.c (r1.15 -> r1.16)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/libpqtypes/libpqtypes/src/param.c.diff?r1=1.15&r2=1.16)
record.c (r1.6 -> r1.7)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/libpqtypes/libpqtypes/src/record.c.diff?r1=1.6&r2=1.7)