Remove (most of) error suppression from database drivers (issue #3036)
diff --git a/system/database/drivers/odbc/odbc_driver.php b/system/database/drivers/odbc/odbc_driver.php
index 14c85c8..06c24d6 100644
--- a/system/database/drivers/odbc/odbc_driver.php
+++ b/system/database/drivers/odbc/odbc_driver.php
@@ -124,7 +124,7 @@
 	 */
 	protected function _execute($sql)
 	{
-		return @odbc_exec($this->conn_id, $sql);
+		return odbc_exec($this->conn_id, $sql);
 	}
 
 	// --------------------------------------------------------------------
@@ -213,7 +213,7 @@
 	 */
 	public function affected_rows()
 	{
-		return @odbc_num_rows($this->result_id);
+		return odbc_num_rows($this->result_id);
 	}
 
 	// --------------------------------------------------------------------
@@ -357,7 +357,7 @@
 	 */
 	protected function _close()
 	{
-		@odbc_close($this->conn_id);
+		odbc_close($this->conn_id);
 	}
 
 }