Fixed palette for LA and PA mode when pickling

Tests/test_pickle.py

@@ -75,6 +75,15 @@ class TestPickle(PillowTestCase):
                                           protocol=protocol,
                                           test_file=test_file)
 
+    def test_pickle_pa_mode(self):
+        # Arrange
+        import pickle
+
+        # Act / Assert
+        for protocol in range(0, pickle.HIGHEST_PROTOCOL + 1):
+            self.helper_pickle_string(pickle, protocol, mode="PA")
+            self.helper_pickle_file(pickle, protocol, mode="PA")
+
     def test_pickle_l_mode(self):
         # Arrange
         import pickle
@@ -84,6 +93,24 @@ class TestPickle(PillowTestCase):
             self.helper_pickle_string(pickle, protocol, mode="L")
             self.helper_pickle_file(pickle, protocol, mode="L")
 
+    def test_pickle_la_mode_with_palette(self):
+        # Arrange
+        import pickle
+        im = Image.open('Tests/images/hopper.jpg')
+        filename = self.tempfile('temp.pkl')
+        im = im.convert("PA")
+
+        # Act / Assert
+        for protocol in range(0, pickle.HIGHEST_PROTOCOL + 1):
+            im.mode = "LA"
+            with open(filename, 'wb') as f:
+                pickle.dump(im, f, protocol)
+            with open(filename, 'rb') as f:
+                loaded_im = pickle.load(f)
+
+            im.mode = "PA"
+            self.assertEqual(im, loaded_im)
+
     def test_cpickle_l_mode(self):
         # Arrange
         try:

src/PIL/Image.py

@@ -715,7 +715,7 @@ class Image(object):
         self.mode = mode
         self._size = size
         self.im = core.new(mode, size)
-        if mode in ("L", "P") and palette:
+        if mode in ("L", "LA", "P", "PA") and palette:
             self.putpalette(palette)
         self.frombytes(data)