Log Message:
-----------
Improve error detection and recovery in lo_import()/lo_export().
Problems noted while experimenting with new control-C code for psql.
Modified Files:
--------------
pgsql/src/interfaces/libpq:
fe-lobj.c (r1.56 -> r1.57)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/libpq/fe-lobj.c.diff?r1=1.56&r2=1.57)