Bug 9246: Koha installer crash with mysql error

The Koha installer reports "Error 1166 at line 1871: Incorrect column
name 'closed'." Reason: line 1923 in kohastructure.sql had whitespace
between back tick on Column name "closed".

Patch removes white space on given line.

Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Elliott Davis <elliott@test.bywatersolutions.com>
Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>

installer/data/mysql/kohastructure.sql

@@ -1920,7 +1920,7 @@ CREATE TABLE `subscription` (
   `opacdisplaycount` VARCHAR(10) NULL,
   `graceperiod` int(11) NOT NULL default '0',
   `enddate` date default NULL,
-  `closed ` INT(1) NOT NULL DEFAULT 0,
+  `closed` INT(1) NOT NULL DEFAULT 0,
   PRIMARY KEY  (`subscriptionid`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8;