Handle broken Photoshop data

Tests/test_file_jpeg.py

@@ -656,6 +656,11 @@ class TestFileJpeg(PillowTestCase):
                 },
             )
 
+            # Test that the image can still load, even with broken Photoshop data
+            # This image had the APP13 length hexedited to be smaller
+            with Image.open("Tests/images/photoshop-200dpi-broken.jpg") as im_broken:
+                self.assert_image_equal(im_broken, im)
+
         # This image does not contain a Photoshop header string
         with Image.open("Tests/images/app13.jpg") as im:
             self.assertNotIn("photoshop", im.info)

src/PIL/JpegImagePlugin.py

@@ -109,7 +109,10 @@ def APP(self, marker):
             while blocks[offset : offset + 4] == b"8BIM":
                 offset += 4
                 # resource code
-                code = i16(blocks, offset)
+                try:
+                    code = i16(blocks, offset)
+                except struct.error:
+                    break
                 offset += 2
                 # resource name (usually empty)
                 name_len = i8(blocks[offset])