pgAdmin III commit: Fix message when executing an empty query

Fix message when executing an empty query

When a user executes an empty query, pgAdmin thinks it has lost the
connection. Now, we check if PostgreSQL sends us a empty query state, and
we display the right message.

Branch
------
REL-1_16_0_PATCHES

Details
-------
http://git.postgresql.org/gitweb?p=pgadmin3.git;a=commitdiff;h=0fdb120ea2a78eac2f2e09b3107be778f7c6b022

Modified Files
--------------
CHANGELOG                |    2 ++
pgadmin/frm/frmQuery.cpp |    4 ++++
2 files changed, 6 insertions(+), 0 deletions(-)