Merge pull request #3577 from dev-ggallon/Fix_Database

Fix unreachable code in Database/drivers/pdo/subdrivers
diff --git a/system/database/drivers/pdo/subdrivers/pdo_dblib_driver.php b/system/database/drivers/pdo/subdrivers/pdo_dblib_driver.php
index c8d7c77..844ffab 100644
--- a/system/database/drivers/pdo/subdrivers/pdo_dblib_driver.php
+++ b/system/database/drivers/pdo/subdrivers/pdo_dblib_driver.php
@@ -154,7 +154,7 @@
 	 */
 	protected function _list_tables($prefix_limit = FALSE)
 	{
-		return 'SELECT '.$this->escape_identifiers('name')
+		$sql = 'SELECT '.$this->escape_identifiers('name')
 			.' FROM '.$this->escape_identifiers('sysobjects')
 			.' WHERE '.$this->escape_identifiers('type')." = 'U'";
 
diff --git a/system/database/drivers/pdo/subdrivers/pdo_sqlsrv_driver.php b/system/database/drivers/pdo/subdrivers/pdo_sqlsrv_driver.php
index b5bdbf9..f8ae5f6 100644
--- a/system/database/drivers/pdo/subdrivers/pdo_sqlsrv_driver.php
+++ b/system/database/drivers/pdo/subdrivers/pdo_sqlsrv_driver.php
@@ -183,7 +183,7 @@
 	 */
 	protected function _list_tables($prefix_limit = FALSE)
 	{
-		return 'SELECT '.$this->escape_identifiers('name')
+		$sql = 'SELECT '.$this->escape_identifiers('name')
 			.' FROM '.$this->escape_identifiers('sysobjects')
 			.' WHERE '.$this->escape_identifiers('type')." = 'U'";