pgAdmin III commit: Allow the dump of pg schemas

Allow the dump of pg<something> schemas

I forgot that the underscore was a special character with a LIKE "operator".

From Marta Mihoff's report.

Branch
------
REL-1_18_0_PATCHES

Details
-------
http://git.postgresql.org/gitweb?p=pgadmin3.git;a=commitdiff;h=249c023c1e781e535c2aa4bb3b4ed4d9594f17aa

Modified Files
--------------
CHANGELOG                 |    1 +
pgadmin/frm/frmBackup.cpp |    2 +-
2 files changed, 2 insertions(+), 1 deletion(-)