fix tests

Author: wphan

programs/drift/src/state/user.rs

@@ -1407,7 +1407,6 @@ impl Order {
             }
         };
 
-        // if order is post only, can disregard reduce only
         if !self.reduce_only {
             return Ok(base_asset_amount_unfilled);
         }

programs/drift/src/state/user/tests.rs

@@ -1540,7 +1540,7 @@ mod get_base_asset_amount_unfilled {
             ..Order::default()
         };
 
-        assert_eq!(order.get_base_asset_amount_unfilled(Some(1)).unwrap(), 1)
+        assert_eq!(order.get_base_asset_amount_unfilled(Some(1)).unwrap(), 0)
     }
 
     #[test]