pgsql: Fixed segfault in connect when specifying no database name.

Log Message:
-----------
Fixed segfault in connect when specifying no database name.

Modified Files:
--------------
pgsql/src/interfaces/ecpg/ecpglib:
connect.c (r1.23 -> r1.24)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/ecpglib/connect.c.diff?r1=1.23&r2=1.24)
memory.c (r1.5 -> r1.6)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/ecpglib/memory.c.diff?r1=1.5&r2=1.6)