Adjusting get_column_sql() default value to false (Bug #1384473)

On install an error was being thrown:

In Postgres:
Failed to get a recordset: postgres7 error: [-1: ERROR: bind message
supplies 1 parameters, but prepared statement "" requires 0] in
adodb_throw(SELECT name FROM "blocktype_installed" WHERE name IN
('profileinfo','myviews','mygroups','myfriends','wall'), Array)

In Mysql:
Failed to get a recordset: mysqli error: [1064: You have an error in
your SQL syntax; check the manual that corresponds to your MySQL
server version for the right syntax to use near 'NULL' at line 1] in
adodb_throw(SELECT name FROM "blocktype_installed" WHERE name IN
('profileinfo','myviews','mygroups','myfriends','wall')NULL, )

Change-Id: Ifd74ccfce5c8352db2fdc55378f9eede236354c7
Signed-off-by: Robert Lyon <robertl@catalyst.net.nz>
Enforce array (or NULL) sql param for get_recordset_sql()

Bug #1384473

Change-Id: I7a74dc86cb3794b8442084e30f2d13a89b80a7bd