Log Message:
-----------
Fix our version of strdup() to adhere to the standard semantics for
out-of-memory --- that is, return NULL rather than dumping core.
Noted by Qingqing Zhou.
Modified Files:
--------------
pgsql/src/port:
strdup.c (r1.7 -> r1.8)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/port/strdup.c.diff?r1=1.7&r2=1.8)