Fixed search customer bug in sales Takings (#654)

application/controllers/Sales.php

@@ -65,7 +65,7 @@ class Sales extends Secure_Controller
 		$sort   = $this->input->get('sort');
 		$order  = $this->input->get('order');
 
-		$is_valid_receipt = isset($search) ? $this->sale_lib->is_valid_receipt($search) : FALSE;
+		$is_valid_receipt = !empty($search) ? $this->sale_lib->is_valid_receipt($search) : FALSE;
 
 		$filters = array('sale_type' => 'all',
 						'location_id' => 'all',

application/models/Sale.php

@@ -81,12 +81,12 @@ class Sale extends CI_Model
 
 		$this->db->group_by('sale_id');
 		$this->db->order_by($sort, $order);
-		
+
 		if($rows > 0)
 		{
 			$this->db->limit($rows, $limit_from);
 		}
-		
+
 		return $this->db->get();
 	}