Test for icc_profile write issues

Tests/test_file_tiff_metadata.py

@@ -175,6 +175,6 @@
 
         im.save(out)
         reloaded = Image.open(out)
-        self.assert_(type(im.info['icc_profile']) is not type(tuple))
+        self.assert_(type(im.info['icc_profile']) is not tuple)
         self.assertEqual(im.info['icc_profile'], reloaded.info['icc_profile'])
 
@@ -179,5 +179,9 @@
         self.assertEqual(im.info['icc_profile'], reloaded.info['icc_profile'])
 
+        png_out = self.tempfile('temp.png')
+        # This should not error out. #1462
+        im.save(png_out)
+
     def test_iccprofile_binary(self):
         # https://github.com/python-pillow/Pillow/issues/1526
         # We should be able to load this, but probably won't be able to save it.