add return statement

Author: flotho

src/main/java/com/odoojava/api/OdooCommand.java

@@ -185,6 +185,7 @@ public Object[] importData(String objectName, String[] fieldList, Object[][] row
                     new Object[] { fieldList, rows, "init", "", false, session.getContext() });
         } else {
             System.out.println("importData is a legacy method for odoo version <= 9");
+            return new Object[]{};
         }
     }