loading empty list is ok when strict = false (#1834)

python/mlx/nn/layers/base.py

@@ -192,6 +192,7 @@ class Module(dict):
                         f"shape {v_new.shape} for parameter {k}"
                     )
 
+        if len(weights) != 0:
             self.update(tree_unflatten(weights))
         return self
 

python/tests/test_nn.py

@@ -167,6 +167,9 @@ class TestBase(mlx_tests.MLXTestCase):
                 ]
             )
 
+        # Empty weights is ok if strict is false
+        m.load_weights([], strict=False)
+
     def test_module_state(self):
         m = nn.Linear(10, 1)
         m.state["hello"] = "world"